He can say whatever he wants to the press, again, if the C-level execs at Disney decide that Day and Date is the best strategy for Marvel movies, then that's what will happen, because they run the company, not Feige.
I think doing day and date is actually perfectly fine for Marvel. Think about it - if a throwaway prequel like Black Widow was able to do $80M domestic theatrical and $60M on Disney+ globally, then what's the loss? Did we really expect Black Widow to open much more than $80M had this gotten to open pre-pandemic? Really? This movie was always going to open around the same as Ant-Man and The Wasp/Doctor Strange, which were right around this range. Then add on top of that they were able to collect an extra $60M on Disney+, of which at least $20M of that was Domestic (SambaTV analytics claims $30M).
I just don't see how they look at this and see how this is pretty much the low point for what they will earn theatrically and on Disney+ with MCU movies. It also gives people a choice. If you want to go to a theater, which many do, then you still can have that experience. But if you want to just watch the movie at home, then guess what? You can! And if you have basically 3 people or more, you're saving money, and that's not counting money spent on gas, food, drinks, etc that you may spend while going out. $30 really actually doesn't look bad to a lot of people when you think of it like that.