The idea that a doctor has some greater duty is a completely artificial construct and exists only because society decides it exists. And, keep in mind that we actually have a debate in this country about rights to health care You've made the point several times that you believe individual cost of premiums is more important that universal coverage. So, what duty does a doctor have to a patient that can't afford his services? What is to stop society from saying that a doctor no longer has to take a vow and will be accountable for not acting in the patients best interest?
If medicine seems an uncomfortable comparison, then let's pick another. How about lawyers. When you hire a lawyer, that lawyer has an ethical, and legal, obligation to put your interest over theirs. And, that means consumers of legal services aren't always given all the available options that are possible. Lawyers are held back from offering everything they can. And, the reason is those options may benefit the lawyer and not the client, or benefit the lawyer at the expense of the client. A lawyer who does that can lose his license to practice law and be sued by his clients.
The rules are govern both doctors and lawyers are man made. They are not laws of nature. They exist because, at some point in time, society decided that we are all collectively better off if these professions have certain duties to their clientele. There is no reason at all that financial advisors can't also be given a greater duty than they traditionally have. The only reason they aren't is because they don't want it, and Mr. "drain the swamp" has waded right into the middle of the muck and given them a seat at the table. Despite what that asshat said about "consumer choice", there is no consumer benefit here. None.
As for why your father never got f***ed over by a banker, that's a bit like asking Col. Jessup why Santiago wasn't packed.
How should I know? Maybe your dad had a pension and never invested. Maybe he passed away before financial services companies came up with all these new equities and derivatives they used to screw so many of their clients. I'm an educated man, but I can't comment intelligently on the investing habits of the last psu_granddad.