You don't have to do it if you don't feel it's right for you, OP. As I grow older (am retired now) I notice more and more the little things that I have in common with my genetic relatives, and I'm quite sad that there are very few left who I'm close to.
Some non-genetic relatives I've known for all my life, but it is, nonetheless, a bit different.
I'm glad I knew both my parents and various other relatives, because it gives me a solid idea of "where I came from" in the great jigsaw of life.
I've seen a couple of friends - also middle aged - work to track down missing genetic relatives (fathers, mothers, siblings, cousins).
Of course, one of the most significant relationships we EVER have - our life partner - is, by definition, with someone we are NOT related to.
But still, it's an important thing to think through, because not only are you deciding whether to have a child who won't, as she grows up, remind you of you, your parents, your aunties and uncles and siblings - you're also bringing a child into the world who will lack that recognition with half of her relatives. She will quite likely - maybe not at 10, 20, even 30, but eventually - wonder, and want to find and know her genetic relatives. That's natural whether or not you are adopted or donor conceived - I have tracked down and met various cousins. The outside world would just see that we saw each other once or twice and keep in touch on FB and think it's not so important to me - but it does actually mean a lot.
I do often get on with the in-laws side of my family a lot better than with my genetic relatives though - so it's not like genetic relationship = everything rosy!