I have bad arthritis in my hands, to help alleviate this issue one of the things I’ve been doing for years is use a built in windows function called ClickLock. It basically holds down the mouse button after you’ve held it down for a second until you click it again.
This had made it much easier to play games where I’m doing a lot of moving with my mouse. It’s not a 3rd party program or some kind of hack every computer has this function built in. I’ve used it in tons of games over the years and never had any issues.
This is the first game I’ve come across where it doesn’t work. I have to assume that it’s something to do with the way the game is programmed and not being able to hold down mouse to move.
Honestly I haven’t looked deep into the controls so maybe the option to change it is already there. But if not I would really appreciate the option to hold mouse down to move instead of having to spam click.