If someone could make a pump that actually "lasts" - then I would think newer specialized pumps could be an advantage, true.
But as every single pump I have seen, will either hold by luck for years, or degrade or get totally useless suddenly and sometimes fast (because of drying out, really small sand blowing into the pump when out etc), I would NOT pay for a better pump, if you have no idea how long it will last
And I have yet to see any "better" pump, that does not have the same problem with sand into the pump and dry gaskets tearing up
So yes, you could (maybe) produce a more specific, and more expensive, kite pump - but as it most likely will be just as vulnerable - do we really want it ? I dont....
Apparently many has problems with backs and knees I can read ?
A bit curious now, as I am over 50, and NOT very flexible - but pumping a kite is the easiest thing in the world IMO, and a good little warmup too.
So can not see anything that is lacking in the current "cheap" pumps - besides the ability to take abuse and really small sand into it without getting worn out...
And the latter, I have yet to see (but dreaming about it).
I will not put more money into a better pump, untill they last longer !
If you take a look at the well represented kitespots, you most often will spot a canned pump, from one brand or another, in the bin
(and yes, I've had numerous pumps from different brands, no difference really....)