What is the benefit of being clipped in?
Stop your feet from slipping?
Faster?
Your feet cannot move?
I have been cycling for over forty and I can't see a benefit for a regular cyclist.
I wear whatever shoes I like and I can walk if I want too.
I can position my feet where I like and where it suits for my pedal speed.
No freezing feet.
Cycling shoes are also idiotic. Stiff as possible. I think cycling shoes should be supple just like my feet are.
I regular ride a 100k solo and fast.