If you just want to be told where to put your fingers, you don’t need to learn it (or much of anything else really).
But if you want to learn songs quickly by ear, predict what the next chord is likely to be when an unfamiliar tune is called, or figure out like chord substitutions to make a progression more interesting, it could come in handy. You may not need to study it, but any good player knows it by sound and uses the 5th-down root motion constantly.
The guy in the video is advocating ignorance based on talking to “professional, high-end” players. Maybe I have a different definition of those terms. if you aspire to be a good player (or even a “musician”), I would suggest aiming a little higher.
But if you want to learn songs quickly by ear, predict what the next chord is likely to be when an unfamiliar tune is called, or figure out like chord substitutions to make a progression more interesting, it could come in handy. You may not need to study it, but any good player knows it by sound and uses the 5th-down root motion constantly.
The guy in the video is advocating ignorance based on talking to “professional, high-end” players. Maybe I have a different definition of those terms. if you aspire to be a good player (or even a “musician”), I would suggest aiming a little higher.