As a fan of the freewrite community, and as a serious writer/workshopper/ editor, I see what you're saying here. "Publishing" our freewrites here might scare off actual publishers someday, because the blockchain is forever. Even if we self-publish, our freewrites can come back to haunt us. On the other hand, some of us are selling books. E.g., @deeanndmathews, who wrote last week about a freewrite prompt that broke open a dam (and no, not in the way of a laxative):

I remembered a detective I made up 20 years ago ... Ironwood Hamilton ...
Captain Hamilton ended up taking on all the "What do I do with this?" prompts as clues, and the world around him started to grow ... I eventually placed him in the county I made up in Virginia for some Civil-War era stories I had just finished at that time: Lofton County, but in modern-day Virginia.
Then, I started looking at the headlines coming through in the last three years -- from Virginia for real, and elsewhere ... the racial issues from the Civil War are still alive and well ... and Captain Hamilton had to start dealing with that, since he was in modern-day Virginia. When the prompts fell right, he did so.

Before publishing freewrites, * we who are serious writers * should clean up our typos, syntax errors, punctuation, spelling, and all that. Not all of us aspire to be published or make writing a career. Many of us are non-native English speakers.

I do regret posting my NaNoWriMo wip a chapter a day (with daily freewrite prompts in mind), because it was all those things you said about first drafts, and the only reason I haven't purged those posts is because I figure nobody will ever read them anyway. Here today, gone tomorrow, at Steemit... no?

I'll think on this some more.