Hi Lana, thank you reading and for your reply!
I am not talking about small product websites. I am talking about bigger e-commerce websites like, for example, ryanair.com. There is nothing wrong with flight tickets as a product. But there is something wrong with the dark pattern in the screenshot I embedded in my post.
I am all for using persuasion techniques. I use them on a daily basis. But there are limits and I find it sad that not every designers respects those limits.