The only reason people use the Tor Browser is for PDF files

You cannot convince me there is any real use for it beyond that. Anything else people claim it does just sounds like unnecessary overengineering for stuff you could do normally in two clicks.

"Oh, it's for privacy."
Sure.

"Oh, it's to bypass censorship."
Of course.

"I'm just interested in the technology."
Yeah, and I'm the Queen of England.