Those w/ less access to sex plausibly suffer simiarly to those with low income, & might similarly hope to organize to lobby for redistribution along this axis. Strikingly, I see little overlap between those concerned about income & sex inequality. http://www.overcomingbias.com/2018/04/two-types-of-envy.html …
The problem is you're confusing what incels want (exclusive romantic partners) with sex. I'd never recommend digging into incel Reddit threads, but if you're going to try to publicly discuss it you should be far more familiar.