1) do you think the bare ancient common word "doctor" should be reserved for people who have completed a doctorate degree? Or is it cool with you if some high school dropout starts calling himself a doctor and dispensing medical advice despite not having any education, experience or certification to do so?
Doctors with a doctorate? It's a funny word that way, but at least in my country, medical doctors are technically masters.
2) He was fined for claiming to be an engineer when he was not registered as such. As someone who has an engineering degree (but is not a professional engineer) I find it difficult to believe he's a legitimate engineer and yet had no idea you can't claim to be an engineer without being registered. I don't know where he was trained, but it was made expressly clear to me that I am not allowed to do that.
Of course you can. In non-stupid places. (Another thing is that "engineer" is actually also a degree level in my country, in addition to all the other meanings you know from English, but I digress...)
3) It was decided that applying math and physics to problems requires registration because if you let just any asshole that swears he knows what he's doing sign off on it, bridges and buildings collapse and people die.
So because of falling bridges, you can't solder your own radio? Isn't it much more meaningful to require certifications and such for specific projects rather than for extremely vague words such as "engineer" in a broad sweep?