the Giants proved they were the best despite their regular season record. Sorry, it’s all about who accomplished more and if the Giants won the chip, then they earned their right to be called the Super Bowl Champions. It’s simple
I disagree with your premise, but it is what it is.
I think the hottest and luckiest team wins the SB. Sometimes that IS the best team, but a lot of times it’s just the team that got the lucky call or ball bounce or coin toss or the right matchups (especially with injuries factored in) at the right time.
A single elimination tournament involving teams in a league ruled by parity creates this dynamic.