Why don't interrogative sentences _start_ with a question mark? [closed]

Not all questions start with Wh- words, so why don't we start a question with a question mark to make it more obvious that it is actually a question?

For instance, when I'm reading a book which has a long interrogative sentence at the bottom of the right-hand page, it often isn't until I turn to the next page that I realize it is a question.

Not that this represents too much of a problem, but from a beginner's perspective it must make it harder to interpret the words of the sentence in the correct context.

Similarly, why don't we start exclamatory sentences with an exclamation mark?

I know this is a trivial question, but I'm wondering whether some kind of historical or colonial/imperial decision might explain the absence of these marks in the situations I describe.

P.S. I am a student programmer, so pardon my ignorance / funniness

The cases where a question sentence in English does not begin with an auxiliary verb (e.g. do, be); a modal (e.g. can, might, will, would) or a wh- word (e.g. what, when, why) are relatively few and far between.

Often the first word is a good indicator as to whether the sentence is going to be interrogative, unlike Italian where questions can look exactly the same as affirmative sentences. In Italian it is only the eroteme that marks or signals to the reader the phrase is a question.

Sei stanco -->You are tired
Sei stanco? --> Are you tired? (note the Subject–auxiliary inversion )

Question words also exist but in Italian there is only one word for why and because

Perché sei stanco? --> Why are you tired?
Perché è tardi! --> Because it's late!

However, I never hear of any Italian speaker or learner asking why there aren't two question/exclamation signs to mark a sentence.

On the history of the question mark/ereteme Wikipedia tells us:

Lynne Truss attributes an early form of the modern question mark in western language to Alcuin of York. Truss describes the punctus interrogativus of the late 8th century as "a lightning flash, striking from right to left" [...] According to a 2011 discovery by a Cambridge manuscript expert, Syriac was the first language to use a punctuation mark to indicate an interrogative sentence. The Syriac question mark has the form of a vertical double dot

There's no mention of the English language ever having two question or exclamation marks in its history.