"Strum in different ways" is not the same as "correct hand position" is "not so with the uke."
Your style: middle finger/ring sometimes pinky. Will it impede for strumming? No. But how's your chucking? Fingerstyle? Big maybe leaning towards yes. People like Chet Atkins, James Burton on guitar used some ref to thumb/index finger pick WITH middle/ring to great effect. The uke has "only" 4 strings but based on tunings different relationships...you could lose more on uke that way than even on guitar.
People develop habits early on that can sometimes hinder fluidity, to be specific, and phrasing.
The "move their arm too much" approach may seem "relaxed" (or in some people's minds "controlled") but like a person at a job interview trying to be too casual too soon it belies a certain high degree of tension...where in practice rhythms get jumped on rather than flow. We're talking "arm" here not relationship to soundhole. I played years ago with a guitarist like that and it was also a grotesquerie to watch...and be around.
The basis for my learning fingerstyle on guitar was long ago placing my pinky on the guitar top, and now years later I'm still grateful for that stability that made variatiions possible...including using that pinky.
If someone like Jake S. had to relearn certain things even while at levels of accomplishment, I find it somewhat bogus to simply advise "anything goes" to you or myself.
The fact that YOU raise the question should tell you something. You're the one that's on to something.
BTW, strumming is not easy. Too many guitarists and yes, uke players think that strumming is easy.
An Ohta-San cover is ultimately more elusive than a Jake S. cover. Are there many Ohta-San covers on YouTube? Is it just a generational thing?