The president isn't actually running the entire county himself, Biden's government isn't fundamentally different from Obama's, Trump also, very obviously from his first term, didn't have much involvement at all in his government. The appointments, the policies his government focus on is a very big deal. Which 80 year old napping from 12pm to 5pm and going to bed, is not the difference that matters.

So let's just get rid of the position then? Hey all those fortune 500 companies don't need CEOs either right? This is not the argument you seek. ~~Although I noticed you edited your comment to make my last reply look out of context.~~

Edit - haha I confused the two places they replied to me. The rest is relevant though.