Starlink is SpaceX's way of guaranteeing SpaceX has a launch client. It increases the number of launches they make, and drives down the cost per launch, both for themselves and for their other customers. They are creating a business model which is both profitable and drives profits to their launch business. This is similar to the synergy Amazon's online store and AWS have with each other. If SpaceX has room on a laun…
Unfortunately it's also littering the sky with a shitload of eventual junk, and immediate astronomical blight.
Continuing to say it doesn't make it true. They deorbit the satellites that stop working and their reliability thus far has been high other than the first two or three launches which had a higher failure rate. Even if they do fail completely and become uncontrollable, they're designed to deorbit within 5 years from operational altitude. They're relatively low mass and have very large solar panels for their size.