I was once a scoffer.
But then I got some - they came with a rule - never wear them in polite society. But they are chuffin ace!
There is nothing better to wear before/after an open water swim; when hopping out of the campervan for a waz; on a bike/kayak trip when setting up your kit and not wanting to mince around in cleats/barefoot; a quick late night trip to the man cave to set up the bike for an early morning ride; any overnight light(ish)weight trip as a 2nd pair of shoes to the 'action' shoe of choice.
I have to keep myself in check now - I've found myself reaching for them on an emergency corner shop mission and had to resist.
Go on, you don't know what you're missing (though riding in them is maybe going a bit far)! If you can't find need for crocs in your life, your life is not rad enough!