Because the way marginal taxation works if you make 300k you paid all those extra brackets tax hikes before you got to 300k and started seeing the lower marginal rate.
So to see your impact you add every changed number from the left up to your income, that’s your impact.
Yes it takes a positive turn at 300k, but you’re already deep in the whole and don’t turn to actually positive until around the final bracket.
Yeah I definitely wasn’t advocating for that, was just explaining how that worked with marginal tax rates.