The problem of cheating in games does not weigh more than the users ultimate ownership of and control over their own property.

No one has a right to a business model.

They can do plenty enough server-side. It's not a blocking problem at all, it's just easier to take over all control of the users pc for your own convenience.

Everything, including all valid goals, is easier if you could just have the power to control whatever you want instead of having to cooperate and respect others and respect boundaries. It's no more valid than saying "Everything would be so much better if everyone would just do what I say.". Using that argument is invalid even if supposedly applied in service to some otherwise valid goal.