Earlier quoted context omitted.
If they can sell you a mac for $1500 I don't think they are very concerned that you're not spending 50 bucks a year on iCloud. I mean, if they prevent Linux you probably won't buy a mac at all, you won't prioritise using an M1 macbook over using Linux if you're a hardcore Linux nerd. Bottomline is that yes they are greedy, but they are not trying to stop people from installing Linux on macs just to perhaps earn some…
Counter point: they have no problem charging $1000+ for iPhones and lock them down to only run the operating systems and apps they approve because consumers of them were largely not technical enough to understand they don't own their own devices. Apple is motivated to do this as soon as they feel they can get away with it and keep profits as high or higher.
For phones, basically nobody wants to run android on an iphone, so it makes no sense to make it possible.
Keep in mind that they don’t lock down iOS because they hate our freedoms, it’s because it is much harder to make it safe and secure if it’s also very open. And since the market of people wanting to run other OSs is so small, they don’t want to take the additional cost.
As to owning you device. Unless you buy real hand stitched shoes with leather soles, your shoes are most likely completely impossible to repair, they’re basically molded rubber. It’s not because Nike hates freedom or even because they want you to buy new shoes more often, it’s because it’s so much cheaper to make shoes that way. But would you argue that you “don’t own your sneakers”?