If you join a group with no description, then you will wipe many many times and everyone will leave.

If you you join a group that says "Have some experience, let's do this!", then you will wipe many many times and everyone will leave.

If you join a group that says "Clear group, looking to kill!", then you will wipe many many times and everyone will leave.

"Must have experience, not a learning group", you will wipe many times and people will leave.

"Must have clear experience, do not join if you don't know what you're doing", you will probably wipe many times and people will leave.

"Must have clear experience, anyone who is not 100% confident don't join" Maybe you have a chance.

"Must prove you have cleared, anyone who makes mistakes will be kicked" Now you have a decent chance of clearing.

"Must have multiple previous clears, must link achievement or gear to prove you've completed. One shot group. Mistakes = Kicked" You can probably clear with this group, usually in just one attempt.