Lightweight, understable disc can be thrown in the wind. You just have to learn how and practice.
Just because you
can do something, doesn't mean you
should.
It's like throwing an anhyzer vs throwing a hyzer, a hyzer is just a more consistent shot. Throwing lightweight discs in strong, gusty winds is a losing strategy, no matter how good you are at it, if you spent half the time practicing throwing max weight discs on more consistent lines it would win out.
Heavy discs also carry further in headwinds unless you don't throw hard enough, in tailwinds lighter weight discs obviously bomb.
Not saying don't bag understable stuff, but relying on it in gusty winds is just worse.
We had a 1000ish rated, former touring pro, who has been playing for 30 years come through and play a 4 round tournament in crazy wind a while back. Through 30 holes he was tied with my sub-900 rated ass, because he couldn't keep it between the lines with his neutral to flippy discs and I leaned on discs that can handle a beating.
The wind died down a little r3 and r4, and we went into the woods for those rounds and he beat me by like 20, hah.
Edit: Also wanted to add that I don't like having big weight variance in the discs I bag, throws off my timing just a little bit, so I prefer sticking with a narrow weight range.