Not a bad point. I suppose if we're going to be intellectually honest here we should add that caveat.
At least SOME of your band needs to be entertaining. Those two guys you mentioned were covered by others on the same stage.
Wyman had Mick, Keith and Ronnie running around like crazy people covering the bases on "entertainment".
Entwistle had the same thing with Pete and Roger (and Moon at one point).
So, you're correct. You don't have to be the ultimate entertainer by yourself if you have a few others taking care of that for you.
But if NONE of you are doing it......
(Keep in mind, your local bar band singer likely is NOT Mick Jagger or Roger Daltrey. So you'll likely have to pitch in.

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