Most business software can be installed by the network admins, software that can't doesn't matter for a lot of these companies and just won't be used. Even in my smaller but rapidly growing company they are doing more to restrict what software can be installed. Easy install of packages isn't what a large company wants

I didn't say anything about package managers. What counts is the software that is available. The best package manager in the world isn't worth anything if it doesn't have the packages that you need.