Tbf avatar 2 was also extremely expensive, its breakeven point was reported to be in the 2 billion ball park (https://time.com/6241639/avatar-2-costs-box-office/)
So Avatar 2 has earned Disney a profit of at least $250m and it still has several more weeks without any competition. And Avatar 3 will have a far lower break-even point.
You can’t say the same about Netflix. Netflix is completely dependent on streaming revenue.