the advertising industry doesn't have a right to invade people's privacy on an unprecedented level, and create a massive black market for reselling people's personal information. But they do, so adblocking is, at the moment, the ethical and morally correct option.

If you work in a part of the advertising industry with any kind of privacy invasion you deserve to lose your job and have your business be shut down, in some cases even jail time would be completely deserved. So no you don't need to allow ads for ethical reasons.