A computer (or a smartphone, basically whichever type of Turing complete Von Neumann machine you use) is your interface to the modern world, from interacting with your government to the stores you frequent and talking to the people you love to the media you consume.

So in that sense I think it does matter who is the ultimate arbiter of what it will and won't do, not only in an individual sense but a societal one. The more people switch to something they themselves control, the less power third parties have over their behavior.

My computer is my work environment and often an entertainment device. As such it affects my quality of life. It affects my mental health as well as my eye health.

Suffering can be real with a bad screen, an overheating laptop or difficult to use software.

My mental health definitely suffers if I'm forced to use software that enriches companies I dislike for good reason.

And there will never be such option if we all collectively choose to perpetuate Apple's monopoly. It is us, of all people, who need to take a stance, because we have the necessary skill.