Incorrect or missing data on cheap chinese VFDs and spindles

here’s the thing the makita a lot of us use is 1/4 horse, so what is so bad about a 120volt spindle that up’s the game to 1.5 hp. that’s what 5 times the horsepower? is a lot quiete5r and more accurate what’s wrong with that? for not too much money and i don’t have to pay an electrician to put in a 220 line?