Frequently new users will have statements in their posts like "I'm new here", "Rookie DM here", "This might be a stupid question", etc. Like this question. Is it ok to edit out these statements? I'm worried that it may come off as rude to users that are unfamiliar with SE.
1\$\begingroup\$ What is your motivation for editing it out? Aside from the likely perceived rudeness, I see no reason to do so in the first place. \$\endgroup\$– NovakApr 25, 2020 at 22:24
\$\begingroup\$ @Novak I feel like it adds clutter more than clarification some cases \$\endgroup\$– lucasvwApr 25, 2020 at 22:33
1\$\begingroup\$ Restrain your impulse, would be my advice. They felt it was important, so unless it's actively harming you or is objectively making the post worse, I'd leave it alone. \$\endgroup\$– NovakApr 25, 2020 at 22:37
Don't remove important context
Whether someone is, by own admission, a new player or gm is important context for a question. Specifically, it helps answerers frame their advice to the kind of querent that is asking. Don't make edits which removes, hides, or obscures this context.
To identify things which are better of removed, try if it retracts from the question. There's no hard line or test to see if something retracts, so it'll be down to a case by case judgement. Stating that you are new to the site specifically is virtually never needed as this is already handled by the new contributor frame around the user mark (which stays for a week following your first post). One of the big things we are editing/polishing posts for are future readers, and you being a new poster here isn't relevant to them.
Using your case as a case study:
The "I'm a very new DM" statement at the start is useful. It should stay.
The rest of that disclaimer isn't necessary, so could be pruned. However, it flows from the way the querent has decided to state they are a new DM and, as it is a seperate paragraph (and italicised), it is easily skippable. Thus it doesn't really noticeably retract from the question and there's no pressing need to remove it.
Having thanks at the end is also something we generally prefer not having as it distracts from the actual question, but as there's only two words at the end dedicated to it, it isn't enough to warrant an edit just for that. There wouldn't be anything wrong with removing it if you were already making edits to the question (and it doesn't break the flow of the text).
4\$\begingroup\$ Yeah I guess "new dm" is more important than new to SE \$\endgroup\$– lucasvwApr 25, 2020 at 21:33
4\$\begingroup\$ Frankly, I don't even agree with the "no 'thanks'" policy. I am unable to fathom brief, basic courtesies being a distraction. \$\endgroup\$– NovakApr 26, 2020 at 4:33
5\$\begingroup\$ That topic's addressed in another meta: What's our policy on editing “Thanks” from new questions? And also this MSE question: Should 'Hi', 'thanks', taglines, and salutations be removed from posts? \$\endgroup\$– V2Blast StaffModApr 26, 2020 at 5:38
1\$\begingroup\$ Yeah, I thought it was silly there, too. \$\endgroup\$– NovakApr 26, 2020 at 6:16
4\$\begingroup\$ I think the last bullet point is absolutely correct: it's not harmful and possibly marginally useful (though that's a matter of broader dispute) to edit to trim the niceties, but it's certainly not sufficient. \$\endgroup\$– nitsua60 ModApr 26, 2020 at 13:16