Using the broad definition you provided, I think it does and it doesn't, although indirectly. I say indirectly because I think balding shatters the confidence of many men, and this lack of confidence leads them to take themselves off the market, so to speak. Being a Norwood 5 with a bare crown would make you undesirable to most 20 year old girls, sure, but women in their late 20s and early 30s are not as obsessed with it, generally, as men themselves are. So I don't think balding itself leads one to a degradation of many a bald man's sex life, but the question is whether or not this is truly involuntary celibacy. As I said, I believe the intermediate step between baldness and celibacy is shattered confidence. I tend to see this as more voluntary than involuntary, as you choose your reaction to your baldness, although I guess some might argue that their psychological response is involuntary like depression or other psychological disorders.
I think a slightly more interesting question is whether balding contributes towards men becoming incels in the stricter definition of the word, which is a sexless misogynistic autist with violent fantasies of retribution for womankind's sin of not giving them sex. I think the answer to this one is yes; I've seen more incel-esque comments per capita among the hair loss community than outside of it. Of course, it could just be that the type of person to become an incel happens to be more predisposed to balding, and balding wasn't the cause per se, but that seems like a weaker argument. I think the idea that the psychological damage incurred due to hair loss, and the ensuing ravaged confidence mentioned earlier, will lead some men to take out their (again, as mentioned earlier, in large part self-inflicted) frustrations on women, is much more likely than the idea that there's some genetic reason that twins misogynistic rage found in incels with baldness. But if anyone has any literature on that, I'm open to perusing it.
