why structs/objects when can tuples everything

Well, probably for the names I assume.
{name: "dog", age: 7, weight: 26} is clearer/easier to work with than ("dog", 7, 26)

Depends on the language but normally structs are named. Tuples are anonymous.
If you want to refer to the same type in multiple places, you probably want to use a struct and refer to its name instead of repeating the tuple definition.

Also, structs can have more stuff like methods/functions, nested types, static properties, etc. Tuples can not have this.

One more thing to consider:
Tuples have either value or reference semantics, it depends on the language.

So for example if the tuples in your language have reference semantics and you want value semantics, you probably want to use struct (which has value semantics in most languages).

Because the world isn't black and white

Sometimes a little nuance goes a long way

Idgaf.
You can do it any way you like, it doesn't matter. It's a stupid debate.

@Ranchonyx yup.

I prefer whatever way is the most readable/understandable. And you could argue one over another in all sorts of situations.