To get stubborn people to try new tools for a change.
Of course their goal is conformity, easier management (e.g. everybody gets the same linters, code formatters, etc), but the above is a nice side benefit too.
There are tons of people using some antiquated editor and swearing by it, that get amazed when they are forced (by a job) to use a modern IDE and see what it can do for them.
And I'm not talking about Emacs etc -- which can do a lot if you set it up right, I talk about people coding e.g. Java with Slickedit or whatever. Heck even Vim users are sometimes surprised of the convenience (and turn-key use) of embedded debugger, build system, actual AST-based auto-completion, refactoring tools, etc.
Because when we code, actually editing text is the least of our worries, and yet this is what most simple "programming editors" focus on -- it's not like we're building huge ASCII art paintings...
