Comedy is about making people laugh. If you do that, then your job is complete. How you do it is largely irrelevant*. I've never understood the concept of "lazy" comedy when applied to entertainers like McIntyre. If there is any comedy to be called lazy, it's the kind of banal bore that You've Been Framed or TV's Naughtiest Blunders, and increasingly, sketch shows churn out.
To be able to find something witty in the behaviour and daily mundanity of the modern, media-sterilised metropolitan man of the type McIntyre portrays shows the abilities of the man. In terms of observational comedy, it may not have the fantasmagorical genius of Bill Bailey's surrealism, nor the sharpness of the bitiing, cynical tendencies of the likes of Jimmy Carr, Ricky Gervais and Frankie Boyle. It may not even be as endearing as the innocence of Ken Dodd, or the wonderfully bittersweet tales spun by Victoria Wood. But McIntyre has his place. Where? Slap bang in the middle. Not at the extremes of Billy Connolly, not at the obscurity of Jethro. He's a normal bloke telling normal jokes. And making people like me, a discerning, conscientious consumer, laugh. What's wrong with that?
Yes, he definitely has a place in that roll call of artistes - but to use one of your examples; Victoria Wood (a genius), labours over the selection of every word, the phrasing of every utterance. She creates vignettes of British culture and life in a way that, I think, is almost unsurpassed.
Michael Mackintyre doesn't have the same "wordsmith" gift, but he is genuinley witty, and has an eye for humorous moments.
But if you hear him being interviewed, or appearing on a panel show, his shtick is exactly the same as his stage show. He has spontaneity of wit, but I think the more seasoned comedians you listed (and others), make a more considered craft of it.
All that said, he's probably just the right fit for BGT, as the gig calls for being sharp in the moment. I just think the panel should reflect higher standards, and for a show with such massive viewing figures, I'm bemused that they can't lure more worthy judges.
Holden, Moron, the Hoff? Gimme a break.
Anyway, good luck to Michael, although I won't break my habit of not watching the show.