Why Can't they Make Iced Tea?

Ok...here in Singapore there are tea shops, places that sell tea leaves and all sorts of tea kettles/pots. I know they are mainly for drinking hot tea. But darn it! it's sweltering over here...why can't I go into a restaurant and order a plain ole' Iced Tea? Instead I have to order Iced Lemon Tea which comes in a can and is sweetened already. They have the same brands we have back home like Nestle and Lipton (I think?) plus others I've never heard of. I just don't get it. How come they act like they have never heard of making regular iced tea so I can sweeten it as I like? Note to self: From now on, don't give in. If you want Iced Tea, then let them figure it out. It isn't that hard.