Gaming has a high cost of entry. Xbox posted its first profit in 2007, six years after the Xbox launch.
I would imagine that they don’t think they have much to bring to the table that would leaps and bounds get them over the current competition; their entry point would probably look like a premium Steam Deck or maybe the Vision Pro for AR gaming, but is that an Apple-sized market to sink their teeth into? Particularly when none of their other devices are traditional-gaming oriented.
It's a digital company that is trying to increase revenue with services instead of just hardware.
How can you ignore gaming whilst offering your own streaming service? The gaming market is many multiples in size of all of Hollywood.