So, my argument is through a perspective of "I can create more content for my games." Through this lens, what's important to me is the quality of the foundation more so then the comprehensive nature of the first party rules.
Because of this, I can (and have) create a suite of weapon masteries and more weapons, thus allowing for a number of combos. And, of course, not every combo is always the most optimal choice; dual-wielding weapons allows you to cover a range of edge cases once the dual-wielder feat comes into play.
So, you're totally correct that just using the PHB won't lead to the huge diversity my post implies. However, homebrewers and third party designers like myself now have a better foundation to build material off of to create the kinds of games we want to see. That's what I like about 2024 the most; it is a better foundation then 2014 for people that share my lens.