No band on 21st-century radio has mined pre-grunge hair-metal's sleaze like L.A.'s Buckcherry. So it makes poetic sense that they'd spend their sixth album tallying all seven deadly sins.
My attitude was always, if you are a huge metal fan, the more dedicated and more obsessive a metal fan you are, then why wouldn't you like more metal, widen your net, and include hair metal?
Around the mid-'90s every hair guy who would have been in a hair-metal band got his tattoos and suddenly decided he was alternative. It just became like a thing.