I think the term "can" is doing some heavy lifting. But I've met quite a few people from the YDSA which I'd easily call comrades. If individuals such as those continue to gain influence in the DSA I can definitely imagine them to be a much greater threat to the ruling class.
A good rule of thumb is assessing whether a local chapter us more focused on unionizing workplaces or of pushing through electoral reform. The chapters attempting the former are often more principled then the ones that spend their efforts doing the latter.