I didn't like this number either, but it's more mainstream than you think. For example, from last year: https://thehill.com/blogs/blog-briefing-room/3868557-most-yo.... This is an opinion article citing a contemporary Pew Research study that appears to support the 60% number, although it's stated as "63% of men under 30 describe themselves as single" (emphasis mine).
I don't think you needed to imply that someone was an incel.