That's right...applying LPF and HPF on everything, multiple times as some automatic SOP...is really NOT the way to go.
I low cut...but I do it during the mixdown, and I do it selectively based on a track's audio content. So, for one track I might roll off -2dB at 125Hz, but for something else it might -5dB at 200Hz...etc.
I usually boost the low end first for each track and listen for the center frequency that is the most annoying/resonant, and that is usually the point where the cut needs to be made.
Again...I think the biggest issue is the monitoring system that is being used and the room.
Also...this new approach of mixing specifically for crappy/narrow bandwidth playback systems/formats...well, is that really helping our audio cause????
I would think those of use who record would be more focused on forcing/driving end users toward higher quality audio instead of giving in and dumbing it down for them.
That's like a painter saying
"Fuck it, no one wants to take the time to go to an art museum to look at oil paintings hanging on a wall...so I'm going to just use a digital camera and post electronic images on the Internet instead of painting with oils."
Audio art is being driven by consumer's need for inexpensive convenience...so we're shooting ourselves in the foot by giving in to that instead of being smart and holding everything up to a higher standard.