No doubt, but that is then true about nearly anything - art, music, film, photography. At the end of the day, we are all alone, but that isn't an excuse to dissuade you from doing anything, especially not coding.
Well, that is changing because technology now allows us to communicate with each other from distant locations. There are websites like HackHands where you can code with a mentor simultaneously. So even the "loneliness" barrier to coding is also dissolving.