There's a lot of truth to this but I think it overlooks the fact that being unattractive is still an uphill battle in every way, just as being attractive is a downhill free ride that can be difficult to f*** up.
An ugly or even average guy has to be impressionable for people to want to be with socially, when there's no clear visible signs that this is a person you want to be known to know, then subconsciously you don't want to know them socially unless you're positively manipulated otherwise.
An attractive guy will automatically attract such social attention as he already has a social standing above an average person. Many traits in his personality are already unattainable for a less attractive man, for example, by simply being normal and not arrogant, he is therefore humble. By simply not being a self-obsessed hack, as it is assumed he could very well be, because of his social status as attractive, he is adorned a positive quality, by doing absolutely nothing.
For an average guy to be humble he needs to have achieved things, he's in a band, skateboards, travels, and barely mentions it. For an ugly guy, multiply more of these positive attributes with each other (for example a top class degree, multi-lingual, published writer, DJ), and if he doesn't brag about these achievements, he is then humble.
For those endless hours of work, he achieves the same status as a handsome man, who simply doesn't brag about how many chicks are on his phone. The only way the handsome man can f*** this free ride up is by being a total social retard, either by bragging or being obnoxiously introverted.
I know plenty of guys with this "free ride" who really have absolutely nothing to them, but because they aren't instantly obnoxious, are embraced by people around them. I even have good friends that I like, who from time-to-time kind of hate the aforementioned typical good looking friend, because they simply wouldn't hang around with them unless status is involved.
And let's not forget that females, sex, and a love life is imperative among the alpha males out there, which represent a considerable amount of the targeted social market, not the majority by any means but most importantly, carry the most influential weight.
This is simply a harsh truth, but by being incel or mainly romantically un-involved with anyone most of the time, you are seen as weird by alpha males, they can't relate to this and see you as questionable in different ways. Possibly homosexual, possibly a paedophile, or maybe some weird otherkin thing they've read about and laughed at.
Being ugly cuts out a lot of social opportunities with these types which can be vital, that's not to say it's the end of it, but you definitely don't have that accessibility to the top of the social food chain.
Your "in's" come a lot lower than that, and your impressionability will decide on your survival with those "in's", and the moments you rub shoulders with the higher ups may decide if those previous bonds with the "in's" are suddenly broken.