As a cashier you are not empowered to make this decision. You are not "able to" violate store policy this way and keep your job. If a store owner or manager wishes to give someone a product for free or issue a full refund, yes they are "able to" do that.

The rep in TFA uses "we," referring to Google. Google is able to reinstate accounts, and The Google Ad Traffic Quality Team is able to reinstate accounts depending on their judgement of whether someone is violating policy. If they are not able to reinstate accounts, can you explain to me why they're adjudicating account ban appeals? Do they say "no" to everyone?

The key point here is that the agent(s) are responsible for interpreting the policy. They have decided that Droidscript violates their policy, and I personally have no opinion about that. But to imply that it's "out of [our] hands]" is dishonest.

Just say "upon review we've determined that your app violates our policies so we will not be reinstating your account."