My company is a couple thousand large and we have maybe 50 PCs in the whole org.

Indeed, to an almost comical extent. I worked at a Mac-only shop that spent 50+ engineering hours per-month debugging the Darwin runtime. Our product didn't ship to Mac either, so we were basically fanagling a Win32 + Linux server toolchain to work on a platform we didn't support.

Tech companies count as consumers, and many consume the Apple product even if it's to their detriment.

Not so much outside a couple of G20 like countries, Windows and GNU/Linux win out.

Then there are all the electronic devices that have CPUs on them and don't run any kind of Apple related software.