One thing I have noticed about the mountains of information on the internet is that you need to see if it's being written for on-road or off-road racing.
On-road racing cars rely much more on the chemical reaction of the tyre and the tarmac/carpet to generate it's grip e.g. the heat and friction sticking the tyre to the surface.
Off-road racing cars rely much more on the physical structure/design of the tyre's impact on the dirt/carpet to generate it's grip e.g. the pins/bars on the tyre digging into the surface to push against it.
These two very different requirements need different set-up techniques and vehicle dynamic parameters to get them to work effectively, so what works for touring cars won't translate to buggies for a lot of things.
That's why I've learnt it's important to see what application the advice is being given on.
Have fun picking through it all, though, it can be fun!