I have lost several products due to a broken micro USB port. One was a $1000 tablet computer (Lenovo - not a cheap make) and it was a common faul on that. It is a real problem. USB connectors, especially micro USB, cannot be easily supported and all the stress is transmitted to the PCB which in modern electronics tends to be thin; not the 1.6mm industrial standard but often something like 0.7mm and that just breaks. I do this in my day job, BTW
It is a pity that in 2018 you still have to plug in a cable or extract an SD card, to get photos off a $2000 camera. It looks to me like a lot of R&D goes into the sensor and the optics, but the rest of the camera is not much more than the hardware and code from some CPU maker's reference design prototyping board
That is actually how most products get developed (you re-package the CPU development kit into your product's box) but in the DSLR budget and technology league you would expect a lot more to go into it. Mobile phones run wifi at 5GHz now, and probably achieve something like 50 megabytes/sec; half that on the standard 2.4GHz wifi. There is no reason why Pentax could not do that, other than being lazy and seeing that nobody else has bothered either.