Yea, there's nothing wrong with trying to minimize your tax bill.
This is a high first world problem but with 12 million US saved up I don't think OHIP should be that big of a lure.
If you needed really important urgent medical care, immediately, right now, - the number of institutional blockages and restrictions and slow downs in place with OHIP would mean you would likely have to fly down to some California hospital to spend 2 million dollars on 6 weeks of hospital care to save your life assuming you wanted to save it.
Money, gets you a lot more than what OHIP can offer.
I have an uncle who was the president and chief operating officer for 20 years of a very large NYSE listed company with market cap of 9.3 billion US ;so, I think he's pretty well off judging from the residences he owns.
Anyway, he goes down to some clinic around Baltimore once a year for a full day, 25,000 dollar yearly physical. One of those yearly physicals saved his life because it uncovered something OHIP never would have found.
But, that's not really all that important because the unwritten subtext of this thread is that you seem a bit tired and jaded by life; so, the broader question perhaps is what constitutes a human life well lived. And that's a very important question all people need to ask themselves.
All great human lives lived seem to be characterized by a child like kind of spirit for exploration, discovery, innovation and creativity; so, if you're looking for something that turns your crank maybe you should do something that you have a lot of passion for. Something that makes you come alive.
I also get the feeling you also need a deeper connection with whatever community you live in and more human relationships because despite all your money it seems like you feel a bit isolated; but, that's just my opinion. Good luck in whatever you do.