"Expectations" don't inherently generate revenue. Performing activities that generate revenue... generates revenue. Put another way: expectations don't
entitle you to revenue.
On the legal side, the store gets paid when I buy something because I risk arrest if I don't pay. On the ethical side, I don't steal because doing so deprives someone else of the good I have stolen.
You claim "I know digital vs physical..." and yet you still trot out that tired analogy... because yes, you are implying that viewing a page without ads is the same a stealing physical items, and suggesting that you aren't is just intellectually dishonest.
> Is it okay to flip some bits in your bank account and give yourself money because the computer responds letting you?
Again: adding money to your account necessarily deprives someone else of that money, so, no. There's also a legal deterrent (a fuzzy one, but a bank could probably get a CFAA violation to stick), and just the futility of it: the bank will notice the error and claw the money back anyway. If you spend it, you're still on the hook for it.
> Are you allowed to download paid software for free because someone somewhere served it to you?
If the creator of that software is the one serving it to me, sure! (Just as is the case with ad-supported web content.)
It is just completely baffling to me how people can equate serving up ads with any other form of, y'know, actual payment, and suggest that it's somehow unethical to avoid seeing ads.