This is why
No monopoly can be allowed to continue un-regulated and closely scrutinized when it impinges on the well being of society, people's livelihoods, their health, education, etc..
If there were reasonable choice and competition in such an important market then there would be little to argue about. This is not however the case.
It is no different than when every PC got shipped with Windows and Internet Explorer. Now we see a good spread of browsers being used. We also see a good spread of operating systems being used on different devices. No company can price manipulate and the consumer has real choice.