Them, I am reminded that many speakers tour many events with the same talk. I rather like the idea of having fresh speakers on stage over the 4th instance of the very same old talk.
That makes it even less likely that the talk will turn out (as well as complicating the conference schedule). Giving a 30 minute talk is much easier than giving a 10-15 minute talk. "If I am to speak ten minutes, I need a week for preparation; if fifteen minutes, three days; if half an hour, two days; if an hour, I am ready now."
Many conference organizers will give some slots to brand new presenters, especially if the topic seems interesting; they just want a good balance of new and experienced presenters. But a conference that has so many talk submissions that it has to reject incredible talks can afford to be more selective.
I'd rather have an experience talker who is used to giving his talk. You know you will get way more out of it.
- Short meetup talk (10-20 minutes).
- Long meetup talk (20-40 minutes)
- Conference talk.
The only gotcha is that most meetups are not recorded. That makes it difficult to apply for conferences outside of your hometown.
I doubt many meetups will mind if you bring one.
As others have said, it's generally better to build up to a conference presentation through doing smaller events like user groups and maybe lightning or rookie track talks, before trying for a main track slot.