Yes. There are plugins for all of this. When I was using Emacs, I could use omnisharp to navigate files using, yes, one button. There are refactoring tools for emacs as well, though I'm usually fine with just using multiple cursors (also a plugin) so I haven't tried them out.
All my billable work the last 3 years have been with Emacs (ok, except for the last month, that has been Atom). I have never missed the functionality of an IDE.
Nice claim, now do you have data to back up your claim? Meanwhile let me ask you a few quick questions.
Okay, how do you automatically organise imports in emacs? Can you jump to the declaration of an expression with just pressing one button? How do you extract functions or values quickly without having to fiddle around with copy paste? If you use a language with type inference can you quickly view the inferred type by pressing a single button?