Sophia Interesting! I guess that is because you started your musical journey with this course - you did, right?
Well, I had accordion as little child. Not very successful and a long long long time ago. Forgot about everything except I didn't like it very much. Only thing I remember is note values, this seemed natural from the beginning. And maybe this gave me a small advantage in hand independence. Especially if LH plays a humta-dumpta ryhthm pattern. Still, finding the keys is very different from the 4 buttons I used as a child on the accordion all the time.
Piano I started with 2 pieces way way way too difficult for me and quit again because of the frustration of how long it takes to learn something new.
So, you might be right with your assumption, this course was the real start of my musical journey. Never thought about it... interesting.