Nope, you’re 100% right. Dvorak is efficient because it places high-use keys in the middle row and usually each key alternates between left and right hands. The use-case for a phone is usually single handed, or where you want one thump to be close to all the letters in a word. QWERTY is much better I think for one or two digits.
I tried it for a few hours because I thought it might be faster not flipping from QWERTY to Dvorak depending upon my device.
Turns out my muscle memory when using phones is as good as my muscle memory with keyboards.
I’ve tried setting up a BSD VM a few times but never managed to get a desktop environment working. I’m sure it was due to user error.