1970s -- Bands that really sounded different (Styx, ELO, Queen, Led Zeppelin, 10CC, Boston, Fleetwood Mac, etc) were all labeled "ROCK"
Present - Bands sound alike or similar to others both past and present (plus, many try to mold themselves into current trends and will add/omit things based on trendiness instead of artistic integrity) yet they all think that each own their own piece of real estate in the land of musical genres
Oh, the irony............
It may tick you off but there is a valid message: Simplicity...Keep it simple. Yeah, saying there is only "Good" and "Bad" music is being facetious, but keeping everything under generalized boxes (Rock, Funk, Pop, Country. Jazz, etc) works better for simple communication between all listeners
Its pointless to have 6178 different genres of heavy metal ( 5611 which end with the obligatory "-core") that only create confusion when trying to communicate with others......just call them all Heavy Metal...If that term is too light for some folks and they dont want to be in the same box as Judas Priest or Warrant, divide Heavy Metal down one layer (Pop Metal, Extreme Metal, etc) and STOP there: It doesnt need to be sub-divided into Grind Core, Doom Metal, Mathcore, I Pooped In Your Mouth Core, Check Out This Wart On My Scrotum Core, and all the other stupid-ass confusing nonsense,,,,,and bands are at fault because they all freaking have the same basic sound elements yet they try to convince everyone (especially themselves) just how "original" they are! I hate that sh*t --- Youre not original. Connect a kazoo to a Marshall halfstack, find a drummer that plays a kit made out of paintbuckets, a bass player that plays his dong, and an Italian opera singer and make music - that's original! What isnt original is a metal band in a studio and the singer passing gas in a vocal booth while recording and claiming that Extreme Fart-Core has just been invented
$.02
I dont understand why sh*t needs to be complicated