Oh we know Jackson was holding them back. They don't even play the same way. He had Curry (any many other players) pigeonholed into the way Mark Jackson thinks the NBA works instead of evaluating Curry's talents and building a system to suit it, which is what Kerr did. Mark Jackson had a Ferrari and put 87 Octane in it.
I agree to a point. He also was bringing along a younger team that was learning. Maybe he'd have turned them loose offensively. We don't really know because they won a title in Kerr's first year.
I'm sure that if you talked to Jackson or any of his people, they'd say that the Warriors would have done just as well. Meanwhile, Kerr supporters will say that it's because of Kerr.
Really doesn't matter anyway, Kerr is the coach and they won the title with him.