You are right! It isn't limited to music. But, since we are musicians here, of course I wish to relate thoughts that relate to our instrument.It's not "despite" the internet, it's partly because of it. The "democratization" of the ability to publish (anyone can create a web site, anyone can post videos on YouTube) means that there is no longer a distinction between qualified professionals and people who know little or nothing. Again, this is not limited to music. We the same thing with crackpots of all sorts building up huge followings among ignorant and stupid people on a wide range of topics: science, politics, religion, etc. It turns out that there was actually some value in having professionals decide what was worth publishing and what wasn't.
I am a pariah for sounding a warning bell that bass teachers from the store level to as high as you wish to look are not going to make you into a better bass player unless you are assigned a weekly dose of perfectly written harmonic music to practice.
Bass teachers are kind. I know this! They love to share with people and want to help make better bass players But (and this is important) kindness is not a criteria that one includes when one seeks to improve their playing. But having the ability to raise up a musician's skills WAY beyond a song, a groove, a performance or a show are what will make everyone improved as players and for life. It is such an easy concept to understand and it can be if people relate it to how they were taught how to drive or how they learned how to read and write; Literally, without, exception, we were all taught academically. If academic training works in every aspect of learning in all other vocations and interests, then anyone logically should be able to associate this approach with being taught how to play the bass by a teacher or in a school.