I was really sleepy when I wrote that. What I was trying to say is that curl type is more of a physical description. It can vary between seasons and locations. It isn't a static hair property. It doesn't need any particular method. It isn't unfair to have a person with heavy product application be a 3a and a person with light product application be a 2b. That just how they like their hair. It isn't important to product selection so much. It's more important to styling and such. Like, I'm a wavy so Im prone to flat top. Therefore, I think your curl type is how you wear it when styled, because that's how you hair normally is.
Also, wavy hair isn't universally weighted down easily. My hair takes a lot of product without being weighed down. And silicones don't always weigh down or particularly damage hair. It really depends on a persons individual hair. The main problem with silicones is they need harsh chemicals to remove them, but many silicone products can give volume and frizz control.
ETA: I kind of felt put off because in the morning I read your original post as being kind of snarky and mean. Like, especially the "what did you do to your hair to make it look like that?" Sentence. I'm sorry if that isn't how you meant it. Sometimes tone doesn't convey well on the Internet. Also, I might be projecting a bit if Im honest. I originally only really washed my hair with sulfate shampoo and brushed it wet/dry/all the time. When I started trying to wear it curly, if I did nothing to it it wouldn't have a curl pattern. It would just kind of expand outward. Conditioner gave me a curl pattern. Now if I did nothing to my hair it would still look 2b wavy, but when I started I would have pretty much convinced myself that it was just straight hair that was awful. The slab conditioner in your hair then let it dry untouched test was what convinced me I had wavy hair.