If you actually compare results across different people across many queries, you will notice that they differ relatively little. The fact that search uses personalization doesn't mean it is always personalized or it affects all results always. It affects relatively small number of queries and relatively small number of results, very dependent on the types of queries and types of results.

Location affects a lot more results than personalization, but that is also very query dependent, so certain queries are affected by the location a lot more than others. And the particular example query is one that you can expect very little location variation.