Re. the 'have you considered adoption?' thing - it's generally accepted that this is not A Good Thing To Say to someone struggling with infertility. You run the real risk of offending someone.
I get that everyone who says this means well - which is why they get defensive when called out on it. But please, learn the lesson. Please do not say it to anyone again.
This
'have you considered / thought about adoption' is a ridiculous question - of COURSE an infertile person will have entertained the idea of adoption. It's not an entirely new concept that they won't have heard of. They will be very aware of it as an option and may well be struggling with their feelings around the issue
It's also hurtful because unless the person in question is an adoptive parent themselves, the likelihood is that they'll come out with desperately ignorant and unhelpful comments like those above about being able to adopt babies and it being just like having your own child, with no knowledge about the care system, the early damage and attachment disorder that can be an issue even with babies, and with no understanding about how LA encourage ongoing letterbox contact with the birth parent, wherever possible
It's a deeply personal and deeply emotionally fraught question. If the person wants to discuss adoption they'll bring it up themselves
None of the following are in any way helpful
Have you thought about adoption?
Have you considered adoption?
Well at least you can always adopt
Why don't you just adopt
There's so many children needing homes - you'd make great adoptive parents, why don't you go down that route?