That is fine. Other companies will fill that void. There are plenty of small indy companies that make great single-player games, that could benefit from the attention.

This might happen to so extent but a big part of the market is single player games, so those companies would also lose a large portion of their profit

Ok, but the context of the article (which I quoted) is multi player games with a single player mode. Of course single player games don’t need and often don’t have a server, so whether or not they make up a large part of the market is irrelevant here.