The late Ken Dodd, barely paraphrased:
Everyone's got a chuckle-muscle, but you have to exercise it every day or it wastes away.
I didn't watch too much Chucklevision/etc, aimed at children at an age when I was neither a child nor watching ironically as a student, but I do know they were
the consummate… ummm… not strictly physical
comedians (like Keaton, Lloyd or Chaplin), but physical-situational
comedians, perhaps even comparable (arguably) with Laurel and Hardy. They had 'gags', but they mainly had exquisite choreography and expressiveness, from what I recall. No superhuman feats, but a ballet-like performance, IIRC.
Obviously they were experienced panto-players, and came to fame through a mild-grotesque two-hander act in the '70s, and still had been shown to have be able to be employed even today, moulding to various capacities. That's a skill to have, in anybody's field, and certainly a pair
of performers, not so easy to (say) write a bit-part into a Midsomer Murders or do a King Lear run, to try to establish a serious-drama option beyond the original remit.
("They"+"Were" because "They" is now in the past tense, but the other brother is still alive of course, and my condolences - for what they are worth, on here - go out to him.)