I don’t see this in terms of independence, I see it in terms of a reasonable compromise, taking into account the practical impact of your situation because you live together.
If you were just dating, you would be living separately and would just have different living expenditure (eg you might live in a shared house, he might live in a flat in a more expensive area). But you do live together, and therefore you have to think collectively about a number of things. Like- where you live, the size/quality of your accommodation and things like whether you turn the heating up or down.
You have a good picture of your likely earnings for you both over the next few years, but life has a funny way of not always working out as planned. For example, you might find that your earnings end up outstripping his. Or he may decide to change careers. It happens!
If things do work out financially as you predict, then the impact of you retaining a 50/50 split is that he loses the choice of upgrading your accommodation, or the chance to go on holiday with you, or lots of people their luxury expenditures- all because you cannot afford to keep up the pace with money. That’s not a judgment, by the way, especially as I am in a similar situation!
Instead, we used to split the bills according to % of income, eg if our income was 30/70 then he would pay 70% of the bills. Incidentally, there were times in the past when I was the main earner and so it worked both ways.
This type of split meant that we could have the best lifestyle we could afford, but without it ruining either one of us. And now, years later, we just have one pot and an agreed spending budget.
Don’t look at this as you not being independent. Look at this as you both ensuring that you both have the opportunity to share the nicer things together, like a nice place to live, a holiday or even just a meal out.