Only if it's privately.  Problem is, to get the mass feedback that allows a writer to receive a good idea of what is working and what isn't means you have to put your work out there.  I suppose you could spend your time finding 150 beta readers, but that is time better spent writing more, which ultimately improve your craft as effectively as reader feedback.

Unrepentant?  At first glance, why would someone want to write without regret?  Is the mind open to learning and growth if your write free and unabashed, unconcerned of opinion?  Then again, if one is willing to write shamelessly and with abandon, might they claim proudly their literary voice faster?  Be worried about the quality of their work after presenting more for the public to judge?  I aim for a moderate approach.  I have a small number of beta readers.  I do write shamelessly, throwing only small bits of it out into the universe and *then* let the panic set in.  That sentence manifests more than a writing style, as anyone who knows me intimately can attest. 

But happily fail?  Even if I learn something vital from a failure, I am relieved, grateful.  Not happy.  I think most of us would rather not fail in the first place, as unrealistic as that is.  

Is it better to have written and thrown your work to be devoured and then regurgitated disdainfully by a horde of ravenous readers than to never have published at all?