Nahhhhh, I gotta browse the internet to be effective. That requires me logging into random sites with personal logins.

I don't install anything personal on my work computer, but I wouldn't hesitate to open an email or pdf from a seemingly trusted source. I don't really blame the dev here.

What you propose is a reasonable solution, but I feel like it slams in the face of actual human behavior. Most people act the way I describe, even most tech professionals.