Berkshire has never paid a dime of dividends to anybody.
What's your next premise?
I'm not evaluating Buffett either way with that statement, just pointing out that it is possible and probably necessary to evaluate his behavior without giving consideration to his pledge.
Most people used to do both at the same time and it seemed to work pretty well before Buffett came along. And there's a good analogy to your last point - someone who rents an apartment for 40 years when they could have bought an equivalently valued home two times over. They shouldn't complain when they die with a net worth of zero, they had a roof over their head for 40 years!
Also, mutual policy holders don't "overpay" for insurance as all dividends are returned to them. Only a private insurance company policy holder could overpay. Just thinking about it now, Buffett wouldn't be so rich if his policy holders weren't overpaying, as you're implying.
That’s a great thing.