I'm sorry if you find it annoying - but what did you do under the old QF system where it was X pieces x 32kg (where X was 1 for plebs and more for status)????
It's a serious question???
Seriously - unless you just started flying - or you never flew domestically (ie. just to non-US international destinations with a 23kg total limit), then you had to deal with this exact system.
You make it sound like it was only just invented.
I am intimately aware of the differences in baggage allowances, and it frequently influences who I fly with. For example, when I was a non-status pax, I routinely flew Virgin Atlantic to the UK as their baggage allowance allowed for 1 piece of sporting equipment in addition to the basic allowance, so I could carry my bike.
Virgin's existing offer was superior to Qantas - that helped make me swing leisure flights to Virgin. Now the offering is the same as Qantas and in many other areas the Qantas offering is superior - so I'll move back to Qantas (for leisure flyiing). For business flying, I'll continue with my personal BFOD.
It is amazing how often that even the special sales fares from Virgin cost up to very similar to the Qantas fares when paying extra for baggage, food and IFE.