MEINE GUTE, that's horseshit if I ever heard it...

There's soooo much good music from the 80's, even besides rock and metal, if I started naming bands/albums that were musically relevant for history, released in the 80's, we'd be here all night, yet I'm not sure I can name one musically relevant album from the 2020's. I'm not talking about your personal preferences, I'm talking about 'how music was different before album X and changed course after'.
But hey, if you'd rather live in a world without Welcome To Hell/Black Metal, Number of the Beast, Screaming for Vengeance, Melissa, Master of Puppets/Reign in Blood (take your '86 pick), Seven Churches, Scream Bloody Gore/Leprosy (just focussing on metal for brevity) and listen to Mumford & Sons, you do you.
Just do it like really faaaar away from anyone with actual taste.
Anyway, back onto the main topic:
@DanTravis62 While I do agree with most of the points of the video, especially the part around 18m30s about putting on a voice, I sorta get the feeling most of the criticisms could be applied to any 'hype' genre when it first emerged; as some in this topic also pointed out about the silly conformist anti-conformism of punk(rock). "I'm against society... boring conformist sheeple are lame. I want anarchy! And I'll show this by dressing EXACTLY like any other anti-conformist..."

It's just a thing of most, if not all subcultures. People want to fit with some group, at some point some over-arching group identity emerges and people will either conciously or subconciously mold/adhere/gravitate to that identity, all visual style parts included.
I mean, one of my favourite metal genres, thrash...you'd better bring some black skinny jeans, a bullet belt and white hi-tops if you wanna look the part. And for all the 'too cool for school' guys claiming 'that's superficial, dude, I'm a bad ass non-conformist. I forge my own path!'... sure buddy, fine. Then
don't go looking to mid/late 80's band photo's of Slayer, Nuclear Assault, Metallica, Kreator, etc.
The thing that DOES resonate and irritate most with me is the insincerity of this hipster music fad; whether you like it or not, at least Vince Neil and his crüe actually lived and breathed the debouchery lifestyle they sang about. The guys in Slayer were/are actually extremely interested in WWII, the sick psychology of the human mind, etc.
And some weird Norwegian black-and-white painted doofuses actually burned churches and even killed people. Not saying that it was right...but well...they...practiced what they preached.
Unlike these fake ass Amish-pretending, look-at-me-being-salt-of-the-earth-yet-safely-surburbs-grown-with-a-creditcard, doing weird voice acts.