I agree to that point. In a competitive market with top-tier developers, there is a major risk. However, 99% of developers are not developing in this competitive market, and even then, most games’ code is useless without assets and a framework. I am not an incredibly known dev and I program publically and don’t worry about code being stolen.
And yes, I agree that it can help exploiters who watch your stream. For me, I take that risk, however, I do develop certain parts off stream. Development streaming does not mean making your entire game 24/7 on stream. My streams are 2 hour installations working on 1 feature and fixing bugs.