> Of course, filling out the same hundred questions for every job would be terrible. So there should be a website that collects all the questions and lets you resend them to each employer, and lets the employer pick which questions they require and which they don't.

This is what I did with Obsidian.md, any questions for the applications will be copied and pasted to Obsidian with my answers. If I come across a different applications that have similar question, I look up in Obsidian and use my answer from there with small modification of my answer to fit their culture or mission statement.

It helps a lot because often the company I applied for usually asked for Cover Letter. Obsidian.md have my cover letters for various companies I applied for and it is easy to look back to those and find the one that fits best or create a new entry with a copy of the previous letter and modify it from there.