I imagine it's probably more than just price. A laptop is less portable and requires a backpack to carry it, and requires access to wall sockets to continuously

I imagine it's probably more than just price. A laptop is less portable and requires a backpack to carry it, and requires access to wall sockets to continuously charge it. You may be at greater risk of being robbed, and the people around you may have distrust of such technology or there may be other social factors at play. You also have to have the digital literacy to operate a full blown desktop operating system (may not be as much of a problem for people who figured out Termux, but Android is still much simpler in general). Plus if someone has an Android device it doesn't mean they were easily able to afford it, it could've been a gift from long ago, or a hand-me-down, or required years of hard work to get, etc