"Skilled players".

No.
Average player who know how to question and watch mechanics can deal with and clear that kind of content.

Besides, that's precisely what the mentor system is here for.
To unlock the mentor roulette, you need to clear every extreme because you're expected to be able to help newcomers on every type of content.
If the group isn't patient, this isn't the fault of the content, but the group itself. On the other hand, you can match with people who will stay until the end of the timer and possibily clear it.

This roulette works as intented.