Disabling highlighting and right clicking is common in some places in East Asia such as Korea.
As to why this is done I have no idea. Especially since you can circumvent the disabling of these abilities. Although you have to resort to OCR when a site decides to render the text as an image.
Korea uses KakaoT as a ride hailing app. But all it does is hail taxis. Uber in Korea just hails Uber branded taxis. I have no idea if they are officially affiliated with Uber or not.
I (living in SK for twenty years) do remember reading within the last year(?) that the government corrected the legal regulation that prevented foreigners from joining an online bank like Kakao Bank (it was a catch-22 situation, the rules required the bank to verify an account holder's ID using a system that only worked for citizens... the procedure to verify a foreigner required face-to-face verification with documents, but online banks by law were not allowed to have brick-and-mortar offices for customers to visit).
However, I have yet to read that any of the online banks have changed their procedure to take advantage of these changed regulations.
No, sorry, this was told to me by a Korean colleague years ago. IIRC he said it was mostly black pepper but sometimes something closer to Szechuan pepper, which Wikipedia tells me today is probably https://en.wikipedia.org/wiki/Zanthoxylum_piperitum. His claim about napa cabbage is easy to verify (and of course daikon and other vegetables are are still very common in kimchi, so it's easy to imagine kimchi without it) but I can't any more details about the supposed black pepper version.
As to why this is done I have no idea. Especially since you can circumvent the disabling of these abilities. Although you have to resort to OCR when a site decides to render the text as an image.