Speaking as someone who is 30 and balding, grey all day.
Jesus, you guys with hair have no idea how much women judge you just based on your hair alone.
No women is going to reject the 55-year-old version of you based on your lack of hair. They'll reject you for the million other reasons that make you gross....these same women aren't going to date a 30-year-old who is COMPLETELY gray, by the way.
Kind of feel like I'm taking crazy pills here, but I'm not sure you guys are reading the conditions of the hypothetical - choose late baldness, and you'll get through your prime years looking perfectly normal, and ahead of the game in your 40's where more than half of all the other dudes are already losing it. As a 37 year old whose hair is in shambles, this would be a blessing.
I can't say I've ever met someone with a full head of gray hair at 30, but I think most of you are thinking salt and pepper, or if not, you'll suddenly be a young Geralt of Rivia.