Unfortunately the doctors usually aren’t the ones managing the schedule. The admin / secretaries are.
And good ones, that understand that a new patient with no file, that doesn’t speak the language, that has a history of complications with her previous pregnancies, etc is not gonna be a normal half hour consultation are extremely rare.
Even kind ones that see that you are swamped day in day out just seem to assume that these are teething difficulties, adapting to the position, etc (even after almost two years).

And so that’s how my wife ends up doing a ten hour workday. Nonstop. With no break for lunch because hey, too bad, she finished the morning shift two hours late and now her first afternoon appointment has been waiting for half an hour…

But of course if you tell patients there is no time for them because the few doctors that are here are already overworked…

(to be clear, I’ve been saying the same thing as you to my wife for two years now. But apparently the message is not getting across)