You're not expanding people's knowledge, you are limiting it by letting them believe a few decent primary skills and adecent potential rating are all they need.
You need 5 in at least 2 of JR, OD, and Passing plus at least 5 in IS, ID and rebounding (and I'd say shotblocking) in a 6'9" or taller PF trainee if they're going to make the most of their superstar potential and have the skills necessary to start and compete at a high level.
And frankly, the EBBL is not so good that it's unattainable to new players. Anyone can get there if they're good enough, as Hadron has proved. If English clubs aren't aiming for the EBBL, what's the point of playing?
If it's to train an NT player, then the need for selecting the right better trainee with the right starting stats is even more important, not less so.