I don't think there's anything wrong with that. I think having an unfamiliar subject presented to you in an enjoyable and understandable way is actually a really good thing for expanding your perspective. But that's very different from taking a class to gain proficiency.
Of course there's also the other type of "master class" where a master teaches the nuances that set the masters apart from the "merely proficient".
But they're not?
They're using the word as a trademark, sure, but the actual service is obviously intended for people of a variety of skill levels, as thematically connected by being taught by well-known 'masters' (such as the Penn and Teller magic lessons).
In other words, when I buy an Apple computer and it doesn't include any apples in the box, that's not 'paradoxical'.
It's clear in this case that the reason they have famous people is because of the celebrity value.
I've had a subscription for about eight months now.
Most of the classes are at the same level that "prosumer" hardware is marketed at: advanced amateur or beginning professional.
For example: Daniel Negranu (a poker pro) has a very good class on poker. At no point does he explain how to play the game or what terms like "on the button" mean - that's all assumed knowledge. The target user is a player who can play a solid game already and hold their own in tournaments, perhaps without actually winning the final table.
Thomas Keller's (a famous chef) masterclass is similar: at no point does he explain what a shallot is or how to hold a chef's knife (obscure, seldom-used hooked knives ARE explained if they come up), but he does go into a lot of precise detail about how to cook certain dishes and exactly how to identify the freshest produce or tell when the lamb shank you are braising is done.
>I'd say a master is generally quite well above 90th percentile of people in their field.
The quality of instructors is truly amazing - easily the top 0.1% - most are world-famous masters of their art. Things like acting lessons from AAA celebrities, dancing lessons from the lead ballerina at one of the top companies in the world, music lessons from multi-platinum artists etc.
This sounds like a giant ad for masterclass. I just happen to really like their content and am definitely not paid by them in any way :)
Hope this helps!
FWIW, the best talent usually do not make the best teachers. This is a fact widely remarked upon in the world of sports. Knowing how to get your body to do something well is a very different skill from being able to get another person's body to do something well.
The corollary is that good teachers are rarely great in their field.
Teaching is hard. Just because you are an expert in a field doesn't mean you can teach it.
Probably the only one I would actually trust is the Gordon Ramsay one. He knows his stuff, and it's clear he can teach it.
I absolutely love his shows and youtube videos as entertainment, but he will frequently not mention measurements, temperature or cook time, not mention WHY he's doing something, just that it should be done.
He has a video along the lines of "Cheap simple dorm room meals for college students" that requires expensive ingredients like Saffron and fresh mozzarella, lamb shanks.
As Alton Brown's videos demonstrate, this takes up a LOT of time on air.
The problem, I suspect, is that most of Ramsay's videos are time constrained. When he doesn't seem to be time constrained, he's absolutely delightful to watch.
I've watched him teach things like "how to cook scrambled eggs for breakfast" that are absolutely wonderful.
And watched him screw up the timing of the toast. :)
Given his ability with kids and the times I have seen it shine through in videos, I suspect he is a very strong teacher.