The flip flops are a symbol of freedom from stupid shoes. They a signify a causal lifestyle. They a causal and they are cool. The free the feet from being constrained. By there very design, they are minimalist and they reek of simplicty – nothing complicated about the flip flops (that they call jandals in New Zealand, thongs in Australia and slops or plakkies in South Africa).
The antithesis of that lifestyle and simplicity and freedom is that their are many brands now building arch supports into the humble flip flop and medicalizing them (see the Archies in Australia).
LEAVE THEM ALONE! Feet need to be free to develop and not in jail.