That's good. I wonder if it should be opt-in instead of opt-out. Disabled people are arguably less able to find random configuration options than non-disabled counterparts. I get a bit bothered with how undiscoverable these options are. But power-users by their nature don't mind going to the extra mile to get perf out of their experiences.

There are many types of disabilities. If "power user" means "someone who doesn't use defaults", then people with disabilities are actually more likely to be power users.

Being fast does not make you a power user. "The button works when I push it twice" is a reasonable expectation of a device by default. If that weren't the default, then most people would have a worse experience with their phone.