Many of the Saddlebreds I worked with needed no switches put in. Matter of fact, I think maybe 3 out of show string? But most didn't have to have them.
It's very important though to put it in properly as well as remove it promptly.
One of the Gaited Horses, he had 3 big braids in his tail, when he was up in set, and when it was let down? You could wrap it around his body, and around past the front again, almost to stifles.
I had to lay down a queen sized sheet behind him to pick it out, and could stand in alleyway at the shows too. He had a magnificent tail. He was a liver chestnut, so his tail had silver in it, and used White Mink on it, so the silver shone under the lights in the ring.
Horses make me a better person.