I’ve driven with ‘flippies’ many times; no problem. You can feel through them.
But I know someone who drove wearing Crocs. He missed the brake, hit the accelerator, and rammed into the side of a building, knocking out a bunch of bricks.
Flippies are a lot safer when driving than Crocs, IMHO.
I live in California. Have a boat in Ventura. Travel back and forth between Vegas, Ventura, and where I live. I live in flip flops and drive everywhere with them. Sanuk is my preferred brand.....or Havaianas if I’m feeling really casual. My only other footwear is UGGs when it’s cold or rainy.