Depends on the company and how they hire. Yeah, there are many companies that won't even consider you, but that leaves a lot of excellent candidates for others. Our lead developer joined around 6 years ago as a junior with zero prior experience outside his own side projects. (Which isn't to say it would be normal to go from zero to lead in that time period, but to underline how exceptional he is given he was able to do so.) Many of our other top developers over the years have had similarly non-standard backgrounds. Our screening process is definitely unconventional though; I barely consider resumes until well into the process.
I think if you're legitimately smart and dedicated, and put the time in to build knowledge, you'll be able to get a start somewhere. And once you have real work experience, the credential becomes less and less relevant.
FWIW I do find there's value in actual comp sci and software engineering degrees, and I will give those some amount of weight. But as far as bootcamps, if two candidates demonstrate the same level of skill, knowledge, dedication, etc., it makes zero difference to me if one has a boot camp and the other is self taught.