So? A decent portion of users do use it, and for some of them its a vital feature.
I would be shocked if removing siri would save Apple more money than the lost revenue of fewer iphone sales.
They've just launched a new HomePod that replaces the original. It's weird that there was such a big gap between the first one and the new one.
Apple has earned a lot of money on devices with Siri included. Microsoft has made a lot of money on OSes with Minesweeper included.
It would be wrong to conclude anything about the profitability of Minesweeper based on that fact, just as it is wrong to conclude anything about the profitability of Siri based on the equivalent fact from Apple.