Low-sensitivity speakers — What's special about them?

QUESTION: What is the value in low sensitivity speakers? What do they do for your system or listening experience which make them worth the cost and effort to drive them? Has anyone run the gamut from high to low and wound up with low for a reason?

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I sure wish I had UNDERSTOOD 
These Q's way back when
And after grasping this high sensitivity vs low sensitivity issue, 
Made some honest answers to MYSELF IN all honesty. 
Its kind of like Jimi Hendrix's 
*Have you EVER been experienced?
WEll I have*

Most audiophiles do not understand what a  higher sensitity wide band driver is, does/how it works/how it sounds.
Second, they have noo interest to understand, NOR ask any Q's. 

Your Q's  show your ~~puzzle-ment~~ over how folks can continue down the xover/lower sensitivity path to musical reproduction. 
No doubt over the comming decades as new audiophiles enter this hobby, they will be asking more Q's , wider interest in whats avaliable Before they make a  purchase. 
Xover/lower sensitivity designs  sales will take a  hit, Most  labs will not survive the economic downturn. 

That advice — get a more efficient speaker — makes sense to me, but before I just twist with every opinion I come across (I'm a newbie, so I'm pathetically suggestible), I'd like to hear the other side. Viz.,

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Look the reason you seem to be a  bit skeptical about going towards the high sensitity speakers, is all due to 50 years of marketing ploys from The Industry.
Likea carrot ona stick we were all led down that path,, 
Look at homw many xover designs came out in the past 50 years, 
Hundreds. 
The odds of us ever comming across a  good quality high sensitivity speaker were  slim to none. 
All the audio shops jhad the box xover designs.
It too me 20 yrs to figure out that maybe xover low efficiency was not voicing my clasdsical music the wauy I REALLY wantedd to hear it. 
And so after some hesitations, I FINALLY began ordering several cheap chinese wide band speakers. 
After 4 months experiementations, pay off was nice.
It occured to me to jump  the xover ship forever.
Its takes some curiosity and guts to make this ship jumping.

I'm glad I do not ever again have to hear my classical througha  xover./low efficient speaker ever again. Its like my music is playing for the very 1st time via a  higher (91db) full range 4 inch cheapo chinese speaker. $20/pair, And you get what you pay for, = Not worth 1 cent more than $200 = Avoid all chinese full range = trash. 

When designing a driver, its a choice you make: efficiency or bandwidth.  This choice doesn't change if the driver will be used in a horn or infinite baffle,   

    

@lonemountain Your answer is so simple and logical. I suppose if some of the good stand mount speakers out there didn't try to do it all, they would be easier to drive and more easy to match with a variety of amps. It would be hard, though, for a speaker manufacturer to tell the consumer to get a sub with it if they want full bass.