Why is only the ? and ! put at the front and upside down of a sentence in Spanish?

https://yiffit.net/post/8361682

Why is only the ? and ! put at the front and upside down of a sentence in Spanish? - Yiffit.net

Why not periods? Why doesnโ€™t every sentence in Spanish that isnโ€™t a question or exclamation start with a period floating in the sky?

I would assume it's because it leads the reader to what tone to use in a given sentence. The question mark or exclamation point would be useful in tone throughout the whole sentence, but if neither is present in front of the sentence a regular reading tone could be assumed.

so why add a floating period when nothing being there allows for the same assumption and is much, much simpler and easier?

Still learning Spanish but I believe this is correct, because you can insert a question mark into the middle of a sentence as well if the entire sentence isnโ€™t a question.

Ex:

I have fish, do you want to cook it?

Tengo pescado, ยฟquieres cocinarlo?

You can do that and itโ€™s grammatically correct? :O
Language is more than just written script and spoken words - grammar is very language specific too. In Spanish, the example above is indeed grammatically correct.