Within the CK2 demo store, each product variation type has its corresponding content type.

Looking further into this, all content types (the ones from the CK2 demo store) have the same fields and also the content type display settings are similar.

The CK2 demo store menu and the (for example) Category/Size/Collection downselectors are all handled with taxonomy terms, no need to have different content types for this.

In the case when a bunch of product variation types require the same content-type-fields and content-type-display-settings, is there a specific reason why they just can't make use of the same content type?

Thank you in advance for helping me to get a better understanding into this subject.