That one is on Apple, not on Linux. Their insistence on charging an arm and a leg just to distribute a binary to users and locking down the best open source alternatives forbidding users from installing apps in the device they paid for. Android has a plethora of open source and free office suites available, some better than others, but development isn't stifled, yet. Google is doing their share in fucking up the space by locking up "sideloading".