I'm VERY new to this game and mmos in general. My first mmo was Tera - Don't give me that look - This is my second. I main monk and if you've ran with me ever I hope I never provided poor DPS. I think I do tho as I'm still learning and doing things to my rotation as we speak. I used to be against DPS meters in Tera as it's kindof toxic there. But here I'm in a different stance, I wouldn't mind at all for a DPS meter and wouldn't mind if my DPS was shown. I only want to improve and even in dungeons where I KNOW I sucked people have been really nice to me. I don't think I've ever been told I suck even when I know I did. I honestly think people who are saying no are jaded with most fanbases. This has been the most untoxic game I've EVER played in all my video game life. I think a DPS meter could do nothing but help everyone, look. If people are going to be toxic not having a DPS meter isn't going to stop them.
I see no harm in putting one in, it's just a tool. Assholes will be assholes with or without said tools honestly.