> Amazon is manipulating the marketplace for the customer to buy a product different from what they want

There is no expectation or regulation that a store is supposed to only show customers what they want. A retailer is going to sell you the items you're willing to buy based on what they think will help them drive the most profits.

Imagine for a moment you're a store that sells millions of different products. Now, imagine a customer walks into your store, and as per some government regulation "you're expected only to show the customers who walk into your store products that they want". It's a fairly ridiculous expectation.