I'd be willing to bet that it has more to do with the fact that flash sells product and tipped up treble seems like flash at first. Once you own it, it's your problem if it becomes irritating. I'm in my mid-50s and I've come to realize over the years that good sound is MUCH more than just frequency extension. I can't fully explain it but I know what sounds good to me (and what sounds like crap). My Merlin VSMs won't pressurize a room with bass but they are exceptional where it counts. I also know I've got some hearing loss though it hasn't been measured - I especially have problems when background noise is present (nerve deafness?). When things in the house are quiet though, the music really blooms (my wife jokes about needing to run her "small appliances" every time I sit down to listen).
P.S. - I think there's a similar problem with mastering engineers on many of today's recordings - they know what sells and they produce it that way.
P.S. - I think there's a similar problem with mastering engineers on many of today's recordings - they know what sells and they produce it that way.