Why Women In Islam Must Wear a Hijab?

Yeah, I know. One of the most asked questions about Islam both Muslims and Non-Muslims alike. So, as we all know, women's Aurah(places of the body that must be covered) is from the top of the head to the toes except from the face and hands whereas men are only from the belly button to the knees. Why do they need to wear something that can sometimes be annoying? Isn't Islam supposed to be not overly strict?

   So, let's get an example. I'm sure everyone has at least seen a jewelry shop and some fake ones right? What difference can we find between these two shops? How are the jewelry kept in a real jewelry shop? They are kept in a bullet proof glass casing in the front display and the others in a strong safe to protect it from being stolen. I mean, who doesn't want jewelry if they could just take it for free? Very expensive items I tell you. How about fake jewelry? Displayed without a casing and can be found just about anywhere. It's cheap and no one would be proud to buy it.

   It's the same for women, their body is their dignity and their dignity is the gold and the hijab is that super-strong bullet-proof glass. Of course, everyone hates the perverts that looks at the breasts of the women in public, but why show it in the first place? Creeped out by the weirdos who keep texting you? Why show your body to them? That is also why in Islam, you can't wear tight clothing because  you're actually showing off your body.

   I don't mean to insult the Non-Muslims out there. I'm just putting how it's seen in our religion so don't take it the wrong way. If you aren't satisfied with my answer here, feel free to give a comment.