Real talk, that goes back to what I said earlier.
Many of the self identified ‘incels’ are only sexually interested in a very specific archetype of female, automatically disregarding any woman who isn’t slim, White and young… so in those cases, the issue isn’t actual loneliness or low self esteem - it’s a dude deciding that only a Maxim model (or some other equivalent ideal) is worthy of his peen, and then becoming angry when said model fails to appear instantaneously and fuck him on command.