I always download PDFs. Why would I want to sit in front of a browser for 20 minutes or two hours or however long it takes me to read a paper, while connected to uni VPN or logged in to the journal page, when I can download the PDF, pop it into my collection, and read it anywhere, with a tool that I'm comfortable with?
Im guessing most people immediately go hunting for whatever button gives you a normal pdf. I've never found these journals 'enhanced pdf' to actually provide any benefit.
Sounds like this person hasn’t visited many websites.