Controllers don't issue go-around instructions on a daily basis
At Palo Alto on a fine weekend they issue them on a hourly basis. Doesn't help that they have trainees there who frankly are fairly seriously behind the tower (is that the equivalent of being behind the airplane). But even when the controllers are on top of things, you get noodles who land then dawdle the full length of the runway oblivious to traffic on short final, and so on.