Equating advertisement with market manipulation is a misunderstanding of market operations. Advertising is about getting in touch with people, giving them information, and maybe even convincing them. Do you always buy what you see in ads? No! People can make choices. They think about it, figure it out, and then make a choice
Market manipulation, especially in crypto with the so-called "whales", is an entirely different beast. Setting up the game is what it's all about, not informing or convincing. It's not persuasion when prices drop because a whale chose to spread false rumors or sell a lot of a coin. It's economic treachery
If you think that advertising and market influence are the same thing, you need to learn the big differences between them. To get through the complicated modern economy and fight for fair, open market practices, we need a good understanding of it
Most of the time advertisement can't be consider as market manipulation since I agree with you that people has choices and advertisement goal is to convince people to buy or use their products. But there are times that it can be a little bit manipulative like showing an advertisement that shows defamation to another obvious product company. It's illegal but advertisers can pass through it by doing indirect defamation to another company like branding as X and comparing. This is widely done before and the manipulation happen when people starts to avoid this Brand X that is showed to the advertisement.
The contents of the advertisement maybe fact but it's an evil thing to do when advertising. I've seen it done back then, rumors can start about that certain brand which positively affects the one who put up the advertisement given that they are the one who are on the good side of that advertisement.