There is one word in there that is the reason you cannot throw your crave 300 feet.
I literally teach people to disc golf. I'm not just some keyboard warrior here on the internets. I am also very active in the disc golf community where I live and know and play with a lot of people. My sample size to draw these conclusions is very large. It's not a generalization.
The same reason you're throwing your drivers is the same reason that almost everyone else is. They don't think they can throw far enough with a disc more matched to their skill/speed. They grab slower discs then try and throw it as hard as they can because in their head they think "I need faster disc to throw further, thats how it works." so they throw slower discs harder to get the disc there.
I'm not throwing my putters or 6 speeds "harder" to throw as far as you throw your katana or your tern. I'm throwing them cleaner.
When you throw higher speed stuff like that, it can help you get a bit further because its covering up some bad form stuff. But at the same time limiting your game.
This topic is unfortunately something that can never be really solved because people are going to play their game the way they play their game. And that, in the end, is all that matters. It's about doing what makes you happy on the course at the end of the day.
But at the same time, I don't wanna hear people complain who play like this about their distance or accuracy. And I certainly don't like hearing/seeing folks that stand on this crutch of a play style handing newer players high speed discs trying to get them to learn to play. There are guys who have been playing for 20+ years that I play with and they will hand new players shrykes and katana's and all sorts of other stuff. and I'm just cringing watching these guys try and learn to golf with us as they struggle to get these big drivers moving.