In the past 100 years (a little less, actually), we’ve cut taxes four times. It has failed to grow the economy every time but four.
I agree with a proviso. You do get to a point where the benefit slows down. For example cutting a personal rate from 15% to 14% isn’t going to do much. With the highest rate at 39.5% though, there is lots of room to cut. And of course you can’t cut anymore for about 40% of the population that pays ZERO.
Personally I think the corporate tax cut is fundamentally more important.