It's a professional certification. You can argue about how much significance it has but it's certainly not "made up."
I certainly don't favor the idea that every software engineer/consulting engineer/etc. should have to get a PE before they can call themselves by that title.
You're welcome to feel differently but don't expect a lot of support.
Also for whatever it is worth, I've now worked in mechanical engineering for 5 years and software for about 1 year, and they both feel the same to me. Software is sometimes faster and sloppier, but I think that's just because the build process for a program takes minutes and the build process for the CVD machines I used to design takes months.