Microsoft eventually caved, and put a "Browser Choice" popup in Windows. This was because the US was too big for MS to ignore. Here, we have a similar choice: Turkey wants Google to give users "Search Engine Choice", and because Turkey is relatively small of a market compared to Google's TAM, they decided they'd rather ignore than market than compromise, even though a compromise is probably the best outcome for users, for fair competition.

I think the author is not talking about what Google has a right to do or not do, nor do any moral obligation to play in which field. The problem being highlighted here is that size simply matters too much.