Contrary to common belief learning and covering songs is not easy. It takes committment, drive, ability and time to do it properly.
This is just my theory , I think people with strong backgrounds in originals resist learning covers because they feel it's beneath them. I'm sorry but in actuality it's because they probably don't have what it takes to learn a cover properly.
What's so frustrating is there are tons of good bass and guitar YouTube tutorials showing you exactly how to play a song from start to end.
I have first hand experience with folks that absolutely refuse to learn covers properly. And they all have a million poor excuses. The real reason is, they don't want to put in the work required.
Sorry for the rant, but this is a " hot button" topic for me.
Blue