Two reasons for this: one, they’re broke as hell, so their cost of living wouldn't match with their pent-up urges. Also, the term “involuntary celibate” doesn't just mean they can't get laid, they can't form a meaningful romantic relationship with a woman as well. They don't want to exclusively have sex (even though that's been engrained in internet culture since forever) but to also have someone they can emotionally cling onto as a support person