There is a distinction between installing something via the primary or a secondary mechanism. If someone said I just had to "install" a windows program and it turned out I had to compile it from scratch and set all the registry entries myself, I would be "astonished"(as in: The Principle Of Least Astonishment).

I fully understand that language matters and if this was an attempt by Google to de-legitimize this way of installing, that's no good. But for Christ's sake, having different names for different things is not inherently malicious.