Should hardcore players be banned from playing on low difficulty?

Question

Game development

So that casuals and hardcore players do not play together.

Answer 1

Corridor modular skill difference - must be mandatory.
It will not be otherwise: the first have the opportunity to win, the second have interest / progress.
Merging the skill is not tied to defeats, but to the totality: the frequency of games + defeats (if you often began to lose and play often, do not lower the level!).

Answer 2

See how everyone else is doing - rating with rewards and without any stupid calculations and punishments