Who cares what any former president has to say about President Trump?

Of those men: Two of them sucked so bad they lost re-election, the only guys to do so in the last like 80 years. One was impeached for being a philanderer and a liar. One was George W. Bush, who everybody spent 10 years calling a retard but now suddenly he's an elder statesman with wisdom? Please. And the last is Obama, who is understandably upset that all his bullshit is being undone, but that totally takes away his credibility.

Am I missing something here? Why do we look to the men who drove us towards the cliff to judge the guy who's laying on the brakes of the bus?