Pro-tip: you're not all that special just because you had to wait in a dps queue, everyone sits in a queue at some point. Inherently, people play video games to have fun, and this they shouldn't feel trapped in a duty they done want to run. The only obligation anyone has to their party is to either play courteously and to the best of their ability or leave that party.

If someone leaves the party, they can be replaced. Either by another random or you can do what I do and request someone from a linkshell or your FC. No one who is playing this game is being paid, therefore they do not inherently owe any other player their time.