I think it is very rude to just install to any "default" directory and not asks the user where he wants it to be installed.
On a Mac, I've never wanted an application to go anywhere but the default /Applications. I don't ever recall being asked if I want another location, nor would I want to be.
Is it different on Windows or Linux? And why would you want a different install location?
On Linux, I want to be able to choose my install location because I may want it installed on removable media, or on a different drive for space reasons, or because I want to keep executables used for a single project with the rest of the files that comprise that project.
The same things apply to Windows, but also on Windows (which I only use at work) I specifically want to avoid the use of the standard locations for things so that I don't have to fight with OneDrive about them. Putting them somewhere else means OneDrive will leave them alone.