It's not at all a bigger advantage than ever before. This isn't theoretical, we already have data on this and your hysterics are unjustified.
"According to the
Stathead database, there have been a little over 160 overtime games under the current rules for winning in overtime (including the postseason). The team that got the ball first has won 52% of the time. The team that kicked off has won 42% of the time. The rest were ties, which happens in regular season games when no one scores during the now 10-minute overtime period.
These rules differ from those in college football; rules which are arguably fairer than the NFL's.
In college football, each team — regardless of who wins the overtime coin toss — gets a chance to go on offense from the other's 25 yard-line in the first overtime.
Whereas, in the NFL, teams hope to win the coin toss and win the game at the first time of asking, in the collegiate game, the team that wins the toss usually decides to go on defense first because they will know if the other team scored a touchdown, a field goal or failed to score. Based on that, the team that goes second can choose to be more or less aggressive when they get on offense.
According to data from Oklahoma State's Rick Wilson, a professor at the Spears School of Business, and through some research of box scores from Sports Reference, there have been nearly 300 overtime games involving Division I Football Bowl Subdivision teams from 2013-2021.
The team that received the ball second won 49.7% of the time since 2013, or right about 50% of the time."
https://www.wmur.com/article/the-nf...-and-why-fans-want-to-see-it-changed/38867972