Why is looking after a teenager at 55 an issue
Well, it’s not for some; but as this is a site full of opinions, not facts, and OP invited opinion, I know I would have hated a late baby and all that entailed.
I’m now 52. My kids are in their 20s. We can go in weekends away on a whim, child free holidays, have money for us.
That dynamic in my marriage and life would be totally different if I had had my kids when older, I think
I couldn’t be doing with homework, puberty and teenagers now.
If I am lucky I will get to enjoy grandkids when young enough to be an active part of their lives.
Best of luck whatever you decide OP, I am sure it will be right for you.