Hi eagle,
That’s more because of marketing and profit margins, and to some degree “hype”, than because memory foam mattresses are necessarily any better or worse than any other type of mattresses.
Assuming that the materials in a mattress you are considering are durable enough for your body type and meet the quality/durability guidelines here relative to your weight range … the choice between different types and combinations of materials and components or different types of mattresses are more of a preference and a budget choice than a “better/worse” choice (see this article).
Clawdia’s mattress is made with 100% natural Dunlop latex and the topper she purchased is made from very soft Talalay latex.
There is also more about the pros and cons of memory foam vs latex in post #2 here but the best way to know which type of mattresses or materials you tend to prefer would be based on your own careful testing or personal experience on a range of different types of mattresses that use different materials that you are interested in testing.
Phoenix