Filling spots for people who queue specifically for certain dungeons/ trials is important and I don't mind running Sastasha for the 938459th time if I see a low level character in the party.
But repeatedly getting low level dungeons with a full 50+ party and it being quite clear that nobody needs it for MSQ progression or queued specifically for it IS annoying. Would be nice to have a higher chance for higher level dungeons if the whole party consists of people doing their roulettes.