Walmart has profits of $157B in 2024, but their business model isn't compatible with people just walking in and grabbing stuff without paying - and doesn't make it ethical to do so even if "they'll be just fine even if I do that"
Tapping into your neighbor's cable TV for free channels may not physically deprive anyone of something but it's still wrong.
There are companies that make money by placing ("out of home") ads in the public space. Not looking at those would then also be unethical? Priests sermoning on "thou shalt not hide thy eyes from the fancy displays in the bus stop"? An ad-police, the Conscious Ethical Viewing Effort Force Edict? That's some low-key dystopian thought.
It's also ethical to change browser tabs or leave the room while the ad plays, but blocking it and costing the provider money while not contributing back is not.
