C does let you deploy nicely. A makefile and some discipline are almost all you need. Granted it's not always easy to write a sane makefile, but that is the coder's and not the installer's responsibility.
I don't think it's every C coder's responsibility to know how to make and ship good makefiles. It's certainly is helpful if she does, but it seems silly to say that's a responsibility, just as it isn't the responsibility of an artist to know the laws governing international sales of her artwork.
Sure, but it all depends on the coder's goals. If there's a competing option that's easier to install, prospective users may go with something else. If the coder doesn't care and isn't looking for users, then that's fine.
