To each their own but pheasant hunting without a dog seems crazy to me. Can it be done? Sure.
Can be done. I did it for a decade several times/season before I had my own dog and when I wasn’t able to go with my Grandfather or Uncle who had a dog. I focused on thinner habitat where I had a better chance of recovering a bird when I folded one. I still harvested birds pretty regularly, but I definitely also lost more too. I simply didn’t have the means of owning or taking care of my own dog at the time, but I still wanted to hunt.
I can positively say that I still did better than some other hunters I knew who had a dog, and that was primarily because I hunted private land and they hunted public land.
I’d much rather hunt without a dog than with one that isn’t trained properly or listening. I’ve been on a few hunts where the dog borderline ruined the hunt and I can 100% say we would have done much better without those hell hounds with us.