Often financial obstacles to touring at the level most of us work at. Often few free things promoters include, a place to stay, dinner, guarantee vs. percentage, rider. Often you bust your ass and arrive late afternoon, set up, check and eat perhaps very near the time you take the stage. Often while singing (maybe something very serious) you have to hide the need to burp.
I was in Winnipeg a few years ago touring a play called Actionable about lawsuits and songwriting. Neil Young was going to play the next night. I figured out which hotel he would be staying at, not too difficult to figure out. I left him a package with my new CD. Thought I might be on a roll. Just a couple years earlier I did the same for David Byrne had positive results. The package came back in the mail a month later unopened. Neil has a different set of rules he travels by likely based on legal advice. Congratulations to the firm protecting him from listening to something he might like.