I know why the Switch Pro controller is so expensive

[TomaTito]

cannonballZ said:
What? Because of a charging cable? That's absurd. $70 is a bit much for a controller. Ps4 controllers come with the charger as well, and their only $60 or less if you buy on amazon.

Does the controller have the same HD rumble that the Joycons do? If so, then maybe that would be the reason.

You have to be careful with usb type-c cables, bad ones are sold even on amazon.

http://www.androidpolice.com/2015/11/04/a-google-engineer-who-works-on-usb-type-c-products-is-reviewing-and-identifying-out-of-spec-potentially-dangerous-third-party-cables-and-adapters/

https://www.engadget.com/2016/08/16/usb-certified-chargers/

And the answer to your second question is already in the OP.