No, others have said the same thing right on out to having an edit window free-for-all (no restrictions at all, which I hope you can see is ridiculous). Some people proofread before posting, and I would think this not only common sense, but wise, as @Mem has said. Of course you are free to post your opinion, and so am I and others! I would think most things are proofread before posting. That seems more natural (or organic as you said) to me, but if you think otherwise, well, maybe you need to change that if it does not suit you or serve your needs. The other issue is length of post. Having posted something that is fairly short, proofreading and correcting afterwards within five minutes may generally present no problem, even though we all make mistakes and may miss things. Not so with lengthy posts which by necessity require much more attention. If you find proofreading a waste of your precious time because you are in a hurry to post, again, if your needs and desires are not being met by your own attitudes and actions under known conditions that are not going to change, then it is your attitude and actions that need to change, or your needs and desires will never be met under the current circumstances. Twenty minutes is also too long an edit window. Fifteen people could respond within 20 minutes to something which is then changed? Yeah. Chaos and confusion.I believe 5 minutes is too restrictive. That is my freedom of speech or viewpoint on the matter. Generally, people make corrections in proofreading after a post is done. It’s more organic. Folks, like to post their thoughts live as quick as possible, and then go back and fix it if there is any corrections that need to be made. I believe a 20-minute edit window would be more fair, although I believe no edit window is even necessary. But that's just my belief. Folks can take it or leave it.
Side Note:
Oh, and I cannot be the only person to say this before.