I'm talking about dedicated departments in large companies that try to steer people into more purchases for profit. This is unethical unless people gave their consent.
Now you are simply describing advertising. I do not find it unethical, maybe unpleasant at most. It is the engine of commerce and driving progress. It is a sign of abundance of choice. And let's not forget a company still has to create a compelling product - no ads can override my free will.
I have a bit of knowledge about human nature and some applied logic. I do not need others to tell me how to think and I find Wikipedia a heavily biased and ideologized source.
Wikipedia is not a source. It's a list of sources. You can always add your own (reliable) sources to the list. Basing your decisions on "a bit of knowledge about human nature" is unscientific.