I think the reason they're told that is that they should be encouraged to try different types of markers to see which one fits them best. Hell no, they're not all created equal by any standard, but what the point is that is being gotten at, in my experience, is that there is a marker out there, not always the same one, to fit anyone so that when they find that fit they'll be able to play to the best of their ability. There are learning markers, some cheap and some pricey, that teach how to take care of one and get one into the tech side of things. A Shocker is a great example, one that worked for me, because I constantly had to take it apart, clean, and grease it and be familiar with how it worked. This is a VERY good thing. It makes for players that insist upon knowing their marker, which in my opinion all should. Then there are trigger markers, various varieties of Cockers, Angels, etc, that show you what a trigger can feel like and give ideas as to what the user can look for to get the best performance.
Learn, learn, and learn some more! This is what drives the master paintballer.
Learn, learn, and learn some more! This is what drives the master paintballer.