I like wearing sandals in summer, but not with socks. I never considered them for cycling, I don't fancy catching my feet on the pedals, or carrying an extra pair of footwear.
When it's 40 degrees and you're sweating enough to have your feet squelching in your sandals, you really don't want those feet enclosed in anything!
Try fellwalking: 90 degree heat, one thin pair of socks, another thick woolly pair, thick heavy boots, and feet working harder. It's how I developed a liking for wandering round Youth Hostels barefoot: to dry off and harden the damp softened skin on my feet.
No, I don't worry about stubbing toes or dropping things on my feet in other shoes either.
Speaking of stubbing toes, one evening at Stow hostel I took a running jump at the staircase, as is my wont, and kicked the stair riser. That made my eyes water, I was lucky I didn't break it.