Thomas Shey
Legend
Based on many of the posts I've read on on a number of threads here in over the past few months, the percentage of bad players DMs would not want to play with would be far higher than 30%. Really, 30% doesn't seem too back. Take almost any activity and randomly sample others engaging in that activity. How many of them are you going to want to spend 4-6 hours with 1-4 times a month for most of a year year (based on typical 5e campaign).
Maybe so, but I'm betting the ratio of GMs who can't find other players is far lower than players who have limited options in GMs.