Agree some don't mind buying the best of the best from the start, that's cool too.
If we think of it that way then are helping the class and new driver who is on a 500$ (example) budget or are we discouraging them and pushing them towards a 400$ rtr scaler?
I wouldn't call it limiting them ..... I would call it Rules.
Guidelines everyone has to follow to run in that class. Our local race track has the Dare Stock class. Nothing really stock about it but they have guidelines, rules to what they can and cant use. It doesn't matter if someone wants to spend a million dollars on the car, they still can but it has to conform to the rules they set.
They can still spend a million dollars but now the driver just starting doesn't feel like they have to just because someone else did. They all run the same stuff.
Similar to how I started, buddy of mine said hey can you make a tube frame for my Scorpion. I was like wtf is a scorpion, the kyosho? He showed me and I started digging around and found this site. Built his frame, had fun doing it so bought a bunch of parts to do my own. Ran into a long time racing friend that was crawling and he got me hooked. Shafty was all we had really back then for 2.2 so maybe that's why my heart is in boosting growth that way lol. But Ive been into a lot of corners of R/C for almost 30 years, I know what it involves to compete.
If we don't try something then we already failed ourselves. ;-)