I'm an apostate, I enjoy talking with other apostates from different faiths and there are a lot of reasons, most of us have more than one. The main ones I've seen are:
-- they experienced abuse within and/or was supported by the faith and their abusers were protected by the powers within the faith group.
-- they saw how abuse of others was supported by the faith and were unable to help because the abusers were protected.
-- they came across something in their studies that pushes them to feel they can no longer support and be part of the faith. Reading certain religion writings about women is not an uncommon part of it for both women and men.
-- it just fizzle out - nothing significant happened, the faith just no longer fit, they no longer feel a connection it it. This group doesn't tend to view themselves or be called apostates as they're not usually deeply in a religious community, but this counts I think for why many people reject the faith they grew up in.
I also covered my hair for over a decade, and I stopped through a combination of studying the history of headcovering culturally over the centuries combined with realizing that even covered neck to toe, if a man knocked at my door and my hair wasn't covered, I'd feel naked and really anxious. I didn't want that either for myself or for my daughters. While part of it was rational - the history of it isn't great - it was mainly from unravelling an emotional gut punch.
The age of Aisha is disputed as in those days women / girls matured and went through puberty quicker.
While there is dispute around Aisha's age by modern scholars - there is no evidence for this common assertion that girls used to develop faster and that would not be an argument for the older age, it's an argument that she was younger but more mature. Wider writings of around this time do not support the idea of earlier maturing, nor does biology - if anything they would more likely to go through puberty later and take longer to develop with food being more scarce and under more physical stress in surviving than those of us with modern conveniences have now.
There is no paedophilia in islam. If it was, it wpulsbt be the fastest growing religion my friend
A religious group growing doesn't mean it doesn't have significant flaws. It typically means it is growing in power and being part of the powerful group has benefits, if only in being part of that community. It can also be because a particular group is actively promoting itself compared to other faiths and, as pp have said, be about difference in birth rate.
Every group has bad people in it. Every group has abusers. Going on that there is no paedophillia or slavery when there are obvious examples of it within a group doesn't make them go away, it makes it so those who've suffered it feel they're not allowed to talk about it.
Aisha was already having her menstrual cycles and was year's ahead in knowledge and education.
This is not evidence against the traditional claim that she was a child. Children can and do menstruate. Some forms of Islam and other religions treat having a menstrual cycle as signifier of a woman regardless of age. They are wrong. It is very important we speak out against that concept - it's been used by religious scholars of multiple faiths, Islam included, to promote significant harm to girls. Erasing they are girls is part of how that harm is perpetuated.
You are describing an extreme fundamental oppressive regime not the Muslim faith. You need to stop equating the two.
Those oppressive regimes are using a religion and are supported by religious infrastructures to perpetuate harm.
While it is true and a basic of religious literacy that all faiths are internally diverse and they change over time and place so we shouldn't presume one group of Muslims is just like another group of Muslims, it's also true that religion is interwoven into the culture it is practiced in and we cannot meaningfully separate the two. We cannot equate the two, but attempting to entirely separate them is inaccurate and only benefits abusers - it erases how the faith and the power that its systems wield are part of how that abuse is allowed to be perpetuated.
That kind of abuse is a large part of why I'm an apostate - growing up in a family with a lot of religious power, I saw a lot of it and the religion plays a key role, as much as local culture, in how they could do it with little to no consequence to themselves. Saying 'that's not the faith' is basically telling victims of religious abuse that we should shut up and ignore the role religion played in our abuse. It is part of it, in every faith group, and in all of them there are people working hard to put an end to it, to support victims, to challenge power at risk to themselves - we can acknowledge those people without erasing the role faith plays into both the good and the bad of it.