That's because these Chads are not competing against you or I, they are competing with each other for access to more women or access to top-tier women, whose standards are going to be much more stringent than for an average Becky. Chads might fuck Becky but they're not looking for a relationship with her. The irony of having many options is that it doesn't really make you happy, all it does is push your standards towards finding girls who are just barely attainable.
A top-tier woman doesn't need to decide whether she's going to date the short, ugly guy or the tall, goodlooking guy. Having a tall, goodlooking guys is already a guarantee for her, there's more than enough of them wanting to take her out on a date. So she needs to limit her dating pool, and the end result is that she will only take seriously good-looking tall guys, who are physically fit and also have a good career.
So you'll often find Chads on the self-improvement treadmill, all competing with each other for the same group of women.
Think of it as two gorilla prides in close proximity. The gorillas aren't really thinking about the beta silverbacks, they are thinking about the next alpha male in their proximity and how they can make his pride their own.