No, there are plenty of people who can make music without reading traditional notation (or any notation at all, in some cases). From my point of view, your comparison would be valid if I said, “You don’t know how to yoyo if you can’t learn a yoyo trick ‘from a book’ or ‘from a video’ (or some other specific format for representing the information)”.
What I am trying to say is that, for me, responsive play and looping are fundamental parts of what the yoyo has been, traditionally, and what yoyoing is for me personally. They aren’t part of 1A anymore, but they’re still a skills baseline just above being able to do a gravity pull and throw a sleeper. The reason I call loops out specifically is that they aren’t part of 1A, so there seems to be a generation of players who don’t bother with learning how to do them (at least a little bit, I’m not asking for a world record here, just being competent enough to bust out 2 or 3 loops).
I don’t know if I can be factually incorrect about an opinion and I willingly concede that it would be easy and perfectly valid to build a definition of “really knowing how to yoyo” that is purely based on 1A, 3A, 4A, or 5A (or other styles/sub-styles) that would not meet my criteria. Or even a simpler/minimal version that wouldn’t meet it either.
For example, “if you can’t do a gravity pull, you don’t really know how to yoyo.”
I would argue that there has to be some baseline for what yoyoing is and I would put it at least a little bit above “throwing a sleeper”.
And yeah, this type of reasoning can be a slippery slope into No True Scotsman, but how would you define the baseline for “knowing how to yoyo”? Or it is anyone that can pick one up (e.g. any infant can yoyo if you hand it to them)?
And, full disclosure, I have been playing with yoyos off and on for many years, but I kind of fell away from it around the year 2000 and didn’t pick it up again until 2016 (I think). Prior to picking the hobby back up, I never understood how to actually throw loops because I did not understand the flip part. I could throw what seemed to be a loop but was basically more like a planet hop, so when I tried to loop it a second time it would usually fail because things were now backwards. So, for most of my life, I would say I didn’t really know how to yoyo even though I was very much into the hobby.