You could be right.
The lobbyists will rip their owned congressmen to shreds over this.
The most similar to Reagan’s and Bush’s that did pass a democrat Congress is Trump, iirc. A few levels and adjustments elsewhere. Those have succeeded in the past.
It's not because of the average taxpayer that we have a 70,000+ page tax code. Business and the very top income brackets won't stand for anything that might reduce their benefits. They will fight all these plans to the death.