Yes you say true about make account harder for exchanges they want some documant for confirmation , it was not like that before, i think they need documant for security for users .
yes, for security and convenience for its users. From people who want to maliciously, they ask for your complete documents, so that everything is safe and under control if there is anything suspicious. so users feel safe and comfortable.
Exactly so you'd have to sacrifice your time for bureaucracy and security because the customers are the same people who will blame the exchanges should something go wrong or they get hacked.