Why don't schools simulate a typical 9 to 5 work week for students and remove homework entirely?

I'm from Morocco, and school usually goes from 8 to 12, then again from 2 to 6, sometimes 3 to 7. Yes, we can leave school as late as 7 in the evening sometimes. During the winter, that's exactly when the sun sets. Also, you have lunch at home. Every. Single. Time. Also, only Wednesdays are exempt from afternoon school, but only if you're in primary school, because as soon as you enter secondary school, the whole week is filled up to the brim. And add homework on top of all this. And usually we get that from every single subject (yes, even PE). In many ways, this is worse than what you Muricans are doing. If you guys are being tortured, we're being sent to hell and back 5 days a week every single week for the most part. Also, 1 week holidays every 6 weeks. That's it. And since we're Muslims, we don't even get the 2-3 week "Christmas break". You stay home on January 1st, and go to school the very next day if it's not a weekend. We even study during Ramadan. It sucks less because we leave earlier, but it still sucks. Also, we don't have snow days. Only a super small part of the country gets snow, and you still have to go to school even if that happens. And during the final years of high school, you have a final exam that contains EVERY SINGLE LESSON IN THE YEAR. All of them. Both semesters. And you bet that I hated this when I had to go through it.