The argument is that the scrutiny is in practice not sufficient, as usual in these cases.

The argument generally doesn't demonstrate that. The argument generally goes:

1. Google could do it.

2. <This space is intentionally left blank>

3. Therefore, Google is doing it!

(Step 2 needs to be filled in a bit for it to be a good argument. Generally, analogies don't quite make the cut.)

You are ignoring the value of previous experience:

Please replace 'Google' with 'Profit-driven legal entity in the USA' and reread your argument.

The parent is making an assumption, based on past experience, but is also Most Likely correct.