If I still had all my setups I would zip them up and post them just to prove a point!
When I started in LFS I put a lot of effort in to my FOX setups, I tried to make cars that handled well and usually were neutrally balanced and very drivable. Back in those days I competed in the OWRL and I recall one event at Fern Bay where I was doing very well in practice and placing in the top few spots. I gave my set up out to a lot of people who in turn shared it, and by race day I was top of the mid-field.
Was I beaten by my own set up?
In part yes I was and I was even thanked for making it (a reward in it's own right), but I was also beaten by the fact that I was at that point in time, at my best, the top of the midfield - and no neutrally balanced drivable setup was going to change that.
Later on in my participation in LFS I got more interested in other cars, and not in the least interested in flaffing around with their setups, I started asking for them.
But almost every setup I ever got was tweaked to suite my driving style, more oversteer on some cars/tracks - less needed on others...
The reality is:
Different drivers drive differently.
And that means in a league race the only way to perform at the best that you personally can achieve is to tweak the setup to YOUR requirements. The fine detail is ALWAYS personal. The course detail is always down to car/track combination - so when you ask for and receive / or steal a setup, what you get is the course detail, the fine tuning you still have to do yourself.
So going back to my Fern Bay race, if I had downloaded someone elses set, and not fine tuned it to the near-neutral slightly on the side of understeer driving style I had at that time in the FOX would I have finished top of the midfield?
Probably not. I'd likely have spun, and at best would have made the mid ranks.
Because that was my level of skill at the time.