This is pure nonsense.
Look how arcade players play games like war thunder or world of planes.... they make hard and tight turns, if those players come here in search of a more serious game, it will be instant death for them in a pony.
While in a plane that has lower stall speed like spit 1 or a6m2 it will be much easier for them.
The game needs to help them in making that choice, because if a new player comes to a totaly new game, and he has 'everything' right from the start, he often finds himself lost.
By starting with a pony, he probably cannot do a worser thing, as late war planes are mostly for experienced pilots, and that is running new people off.