The problem here is that tournaments would want their money makers, the marquee players to stay in the event as long as possible for tickets sales and ratings. While we could have some blockbuster first rounds, the tournament could quickly head south if too many upsets happen in the first or second round.
The difference between opinion and fact. OPINION - Federer played in a weak era. FACT - Federer has 17 slams. Opinion is NOT a FACT.