Well idk the details in that specific case, this was just the first example I found. My point is, that different countries, states and institutions disagree on this matter. There is no universal rule that defines what you need to have achieved to call yourself an engineer.
Well yes, but that’s not how your average user thinks and acts. They will either a) contact you as the developer of the app that doesn’t seem to work and when your say it’s not your fault give you bad reviews or b) directly give you bad reviews.