I think you are failing to think in global terms - and focussing on small silos instead.
Out of all the music listened to globally each day, what percentage is listened to at rock concerts - I would guess maybe 0.1% or less
The vast majority of music (maybe 90%) is listened to either from:
- phones using cheap earbuds for 16 hours a day (how many of the younger generations do you see ever remove their earbuds?)
- in car sound systems, with the music being reflected off multiple surfaces. The fact that you can often hear the music from the cars 100m away (even with the windows closed), is ample evidence of the fact that the windows and body panels are resonating away a lot of bass energy. One reason the music is so loud is that the driver is trying to overcome the effects of road noise, engine noise, wind noise, air conditioning fans etc.
These people either buy CDs or download/stream music, so they represent the 'customers', and music production companies know that music with boosted bass levels, and a general 'loudness' will be easier for customers to hear, when listening in otherwise noisy environments.
Eventually many people start to think that music with enhanced bass, played loud from their phone, through cheap earbuds, represents the 'baseline' and any music reproduction equipment that fails to match this, lacks power.