Ok, but hear me out: what if I don't use any of these, just put ToDo everywhere, and don't waste time thinking in what category the current todo should fall on?

Ok, but hear me out: what if I don't use any of these, just put ToDo everywhere, and don't waste time thinking in what category the current todo should fall on? Then I book 15 minutes at the end of each day or even week to categorize everything and put into a backlog.