Extremely crazy idea but might work out to make competitive games more entertaining.

As you might notice at competitive play ( not in solo, you must be really bad jungler, if you let Janna steal baron, while you have 1k damage smite) barons/dragons are often contested, if enemy team has a huge lead they secure the baron. Anyway what i want to say that removing ability to smite baron/dragon would make it more interesting/challenging. I know it sounds absolute bizzare, but i mean most of riot changes work that way right? Want to know peoples opinion on what cons or maybe pros that can bring on the table.