The "blackpill" you are talking about is just empirical evidence collected in a series of experiments. Rave all you want about the incels, but they can be quite scientific when it comes to discovering the reasons for their lack of success with women. And a lot of what they found out in practice, has been later validated in studies like the OkCupid one.
Science and engineering are two separate disciplines, and I'm not a scientist.
If lying to ourselves is how we avoid being suicidal, so be it.
The only possible use I can see for the blackpill is to know that you should give up on casual sex, unless you're into BDSM or something(For some reason all my friends that do that seem to not care about looks as much).
Other that that, a lot of things aren't useful. It's a lot easier to declare sex isn't important and that someday I'll be as happy with my career as I was with the girl I lost it to, 13 years ago.
It might not be useful or believable that looks and genetics don't matter on tinder. But we can tell ourselves they don't matter for life in general, and work to make this so by whatever means we have available to us.