The point is that Google was once held in high esteem
because it acted in an unusually trustworthy way for a large corporation.
Almost everything they were fundamentally trusted on has turned out to be a betrayal. It is right and natural to question and distrust them until they have reestablished trust, which is likely to be a long process.
You will notice that as well as the appropriate distrust, there are also comments from people including yourself who have examined the proxy and determined that Google's trustworthiness is irrelevant to the trustworthiness of the proxy.
This is exactly how it should work. People are right to distrust Google, so the question should be asked. But we are also a technical community who can then analyze and understand the situation to determine whether concern is warranted.
The last thing we need is for people to silence their distrust and for scrutiny to stop.