Truth be told I also feel sharper when not dating or in a relationship, software engineering takes a lot of mental overhead. Competing in the modern meat market that is the current dating scene increases that mental overhead
I think you learn to bear the load more gracefullly as you age and mature. It also puts life more into perspective.
My main point is you learn to handle it, which is actually a good form of personal growth.
I hope you're working at a startup that you own, otherwise you're just helping fund some executive's Disney vacation with his four kids, while you end up an evolutionary dead-end.
but maybe you'll write something that everyone will use for a couple years, then replace, right?
In short bursts this is probably fine (and I followed a similar strategy early in my career) but I am personally happy to have not fallen into the trap of focusing on my career to the detriment of my personal life throughout my entire youth.
Advancing your career may seem important now, but will you feel that way on your deathbed looking back?