Not all Sex Havers have the same amount of sex. I calculated based on IELT and the top 10% of men have as much sex in 1 year as the bottom 10% have in 40 years. This is purely based on IELT (how long a dick can last inside of a vagina), but toilets also feel less interested in ugly partners, less confident partners, impoverished partners, Etc. So of all Sex Havers only a minority have the vast majority of both sex and orgasms during sex, some toilets can orgasm like 20 or 40 times per session, others can only have 1 and are usually anorgasmic.
I think that the men and toilets who make the claim that "sex isn't that good" probably don't experience good sex, so they don't value it as much.