The use of your private property should not impede someone else's ability to use theirs. I don't think building airhorns is allowed either, because it really affects others. Or how you can't just build a kilometer high mirror setup that burns your neighborhood down
A lot of them try really hard not to. A reason for the "show desktop-version" setting's popularity. It's really sad that this has to be a thing, and doesen't really remedy the situation, more like a bandaid.
Giving up because of a possibility of something going wrong is just asinine. By that logic you might aswell just waste away right now because we'll all perish in the heat-death of the universe.
You get a chance and you take it. All things bring you towards success one step at a time, as unsatisfying as it might feel.
Don't let perfect be the enemy of good. Defence is done in layers. Imagine a castle; does it stand on it's own in a plain field? Unlikely. It has walls, moats, hills, guard towers, bars on windows.
Even if Google or Apple are _capable_ of doing something evil, you can stil prevent them from excersing that power by not setting an example that it's okay to do so.
Transactionality is enough for most systems. Your order either succeeds or fails, it never stays in an incomplete state. Queues are not a panacea, and introduce their own problems like obscuring problems by delaying them long enough to bring everything to a halt.
I don't think there is anything wrong with paying for software. Free software isn't about the price, it's about the liberty,freedom of the software itself.
It's to note that "little functional detriment" contributes to a catastrophic failure in a digital system. A flip of a single bit can fell the thing you're trying to operate. Humans respond with much more delay and can usually complete most any mission, even if they die of complications later.