Is the reason for the inequitable blind for .......

I think it’s to compensate the small blind for having a lesser spot. What do you think?

It has to be more than 1 person in order to maintain the purpose of the concept of the the blind: which is to force ppl to play the hand or lose some $. If there was only 1 blind, others could theoretically withdraw and that single blind would just take back their own $; a zero-sum game.