Well another version of it is: I want to be able to talk to my family, but I don't want to buy an iPhone. The EU rightly regulated that any chat network big enough must open their doors to different platforms. Or I don't want to buy Microsoft Office for my employees but I want to be able to do business with those who do, and thankfully we have relatively open document formats now.

The chips argument is contrived, the OS argument less so, but it's all just network effects at some level, and it's important for competition and effective markets that we prevent the largest networks from locking people in and forcing them to make a lot of other unrelated decisions.