Comment by wasmperson

> WHY javascript code is even allowed to see all these actions of the user?

scrolling: used by games, maps, image viewers

link navigation: used for client-side routing (youtube/twitch, any website with a chat window)

text selection and copy/paste: word processors, spreadsheet editors, forum software, etc.

I'm not sure if your question was sincere or if you were trying to say that the web should not support these use cases.