There sure is a whole lotta TLDR in this hobby.
Paint is actually kinda complex, and if you want to understand what you're doing rather than just muddle through with often disastrous results, it takes a little intellectual effort.
People who are happy relying on tried-and-true materials and techniques...fine.
But why bash those who want to understand...or explain...some of the chemistry?
There's a whole lotta misuse of terminology and misinformation bandied about too, both by modelers and manufacturers.
Much of it can lead to ruined paint jobs or spoiled effects, and can sour somebody on building models.
The more complete and accurate understanding you have of anything you use, the more likely you won't be making avoidable mistakes.
EDIT: A little off topic, but the bottom line comes down to, as usual, if you're not certain that specific products and techniques will work together, don't rely solely on what you "heard" or what advice you get here, or even what it says on the products themselves.
TEST TEST TEST TEST and VERIFY before committing to using ANYTHING on a model.