You choose Apple because you like their products and services, not because they're closed. Being closed does not benefit you. You just put up with it because you assume that's the reason the products are good. If you're rich, then you don't even mind because you can afford all the "Apple Approved" products and services.
There's no technical reason you couldn't use your own server, or Google Drive, for syncing Photos or Messages. There's no technical reason you can't use iMessage on Android, or vice versa. There's no technical reason you can't install macOS on a PC, or run software outside the App Store on your iPhone. There's no technical reason non-Apple branded mice suck on macOS, or non-Apple branded wireless headphones suck on iOS. It's not because Apple is so good at everything they do, it's because they put in a lot of effort to create proprietary technologies that they don't let anyone else use and of course they are required for their devices. We have nothing to loose if pressure is put on Apple to make steps towards being less like that.
There's no technical reason you couldn't use your own server, or Google Drive, for syncing Photos or Messages. There's no technical reason you can't use iMessage on Android, or vice versa. There's no technical reason you can't install macOS on a PC, or run software outside the App Store on your iPhone. There's no technical reason non-Apple branded mice suck on macOS, or non-Apple branded wireless headphones suck on iOS. It's not because Apple is so good at everything they do, it's because they put in a lot of effort to create proprietary technologies that they don't let anyone else use and of course they are required for their devices. We have nothing to loose if pressure is put on Apple to make steps towards being less like that.