Controversial opinions on metal

Analyzing music based on only one factor in general is pretty shallow. But analyzing it based on how heavy it is, is extra dudebro-esque.
 
I don't think that either band is great, but each has some music that I like. Both bands influenced quite a few good metal bands too. That's about the extent of my interest in them.

Aerosmith is another band that I lump into the same category.
 
I think that the early music by all three is all comparable in quality. Early albums by all three bands have a few songs that I think are pretty good and a bunch of pretty standard hard rock that's listenable without being amazing.

I won't defend later Aerosmith because it's atrociously bad.
 
Have you listened to AC/DC? It's way more than one riff. The drum pattern? Yes, it's the same, borderline identical 4/4 beat over and over. But you'd have to be tone deaf to call it just one riff. I'm also sick of the people who claim AC/DC songs stick to the same 3 chords and nothing else. I'm not saying they're masters of a bajillion different chords, but you're full of shit if you think it's just three chords. The title track of For Those About Rock has nine different chords for instance.

It was a joke, I like several AC/DC songs but many of their tracks are similar to each other, it happens especially on albums like Fly on the Wall or For Those About to Rock (except for the title track which is great indeed).

And please restrict the number of words you use for writing a single message. Most of your posts are tl;dr even for me, and I love reading.