Especially since the conflicting statements of "software jobs need protection to ensure good salaries" and "everybody needs to code" are all to prevalent here.
Being a PE means you have a certain level of experience and skill. It's a distinguishing feature and sets you apart as a "real" engineer. Additionally, it holds you to an ethical code.
What continues to astound me is the lack of rigor and ethical backbone coming from engineers in important places. Yeah you're not building a bridge, but incidents like Volkswagen and Yahoo could have been prevented if people's jobs were bound by not being unethical.