Why bookshelf type speakers are high end

@kanji I too have a system that goes below 40hz, manufacture says 

• Frequency response. 21 – 25.000 Hz -3dB.

However, I have and had several bookshelf speakers.  These smaller speakers have their place in the market.  Probably the #1 reason is space, but sometimes people prefer a smaller profile and clean look.  

These speaker, typically 2 drivers, I find have great imaging and easier to integrate into a room.  Plus in a smaller space just sound better.

Your absolutes are crazy.  Nothing in life that I know of is all encompassing.  Is a Porsche able to navigate the Rubicon trail and it not a luxury, or carphile vehicle?  Is there a food that satisfies every taste on every occasion and that food not considered the best in its category?

please let me know some absolutes outside the audio industry.  I am curious on what you have found.

I prefer the way stand-mount speaker image and the other factor is that it is very common for the optimal spot in a room for bass reproduction to be different than the optimal spot for midrange and treble reproduction.  

I produce a series of stand-mount speakers (soon 5 speaker between $2K and $7K) partially for this reason.  I will also do a floor-stander as this is where the bulk of the market is but I will likely always keep stand-mounts in my home with subwoofer(s) as that is my preferred sound.  

I have two sets of stand mount/ monitor speakers in my second and third systems.
Both have their very good strengths in imaging and top end detail, both suffer a little on low end extension (obviously, only so much you can do with a 5 inch driver and small box!).
But are they dynamic, cohesive and engaging?
Heck yes.
High end?
Nope, who cares.

If you take a full range speaker that goes to 20hz and then do a high pass filter at 50hz, thats what a typical bookshelf speaker would sound like. A subwoofer is typically added without any high pass filter on the standmount and even if there is, its usually quite low whereas in a 3way floorstander the crossover point could be as high as 200hz. 

I say stop listening to Hertz and start listening to music !