Earlier quoted context omitted.
They don't need to glue USB ports, because IT is intelligent enough to disable access to them via OS configuration. I never understood the stupidity of some people to glue them instead of using OS policies.
I have never seen a company, large or small, which disabled USB ports. Because convenience is always higher rated than security. Glueing is much easier, can't fail with wrong configurations or roll outs, works if people have too many permissions on Linux and in a myriad of other ways.
You've never worked a large bank. They get attacked all the time, every day, over the network, with social engineering (dropping infected USB drives in the parking garage), and plain old physical theft and con-artistry. Moving any file on or off their system is a huge pain (e.g., e-mail attachments are automatically removed unless you go through a security process).