For context, I am not in any way opposed to rap music (I tend to like all genres of music), nor do I object to having "hobbies" or even side-hustles outside of work.
As a fan, I couldn't care less how much time Cole spends in the studio composing his stuff.
However, as a coach or GM, I think I'd have an entirely different reaction to what he said recently. Put yourself in the management chair.
If one of your employees had a drop-off in productivity of 50% or more in the past year, and you see that employee posting on social media that (s)he is really a rapper (or actor, writer, podcaster, poker player, etc.) who just happens to be a [insert your profession here], then wouldn't that employee immediately find him/herself in your office to have a discussion on priorities, dedication, and recent performance results?
As was pointed out in the video placed in the OP, if Cole Beasley had a great year last year, I don't think anyone blinks an eye.
I think that it is the timing of young Mr. Beasley's comments may have been a tad bit unwise.
Now, if the fuzzy little fellow becomes a generational phenomenon in the music industry, then YEET!