It's easier to make a living doing shows then it is to sell albums.
Touring definitely helps sell albums. Things have changed. I've noticed now more than ever when you market an album, get radio play/video play etc. it helps sell albums but it helps get more shows.
Once I finish a song, it's done and it's on the album.
A lot of people don't want to put that work in they just want to be famous.
Touring is everything. Without touring, you're just another artist on the internet trying to get your music out.