username: “If you really feel guilty, and you know that eating not Lesheim Shamayim in a Sukkah is really bad, I could see a Sevara to say that.”
I can come up with sevaros for lots of things, but some of them are megaleh panim baTorah shelo kehalacha. The above statement of yours falls into the same category.
Halocho paskens that unless you are mitzta’er and unable to accomplish the act that you are about to do, you have to do it in the sukkah. For example, if you can’t eat the mikpeh (whatever type of food that is) because the rain is ruining it, you are pattur. Similarly, if you can’t sleep in the sukkah because of the weather, mosquitoes, whatever, you are pattur. But you’re not pattur because you CAN eat or sleep and feel guilty about it.
To show the absurdity of it: if I know it’s currently raining in another neighborhood and I feel tzaar for those people who can’t eat in their sukkah, am I pattur? (If you answer yes, I really have nothing further to say. If you answer no, then) How then can I be pattur from sleeping in a sukkah when I can sleep somewhat comfortably but someone else can’t?
I’ll give you one even more absurd scenario. It’s a beautiful day and I am eating my seudas Yom Tov in the sukkah when, out of the blue, I remember that the rebbe can’t sleep in the sukkah because he has tzaar. The fact that I don’t experience the same tzaar when I try to sleep in the sukkah causes me tzaar. So I can now take my food and eat it inside because I am currently being mitztaer about being able to sleep in the sukkah even though I have no intention of sleeping at the moment. Would you agree with that? If yes, then I give up. If no, please explain why when I think about the rebbe’s tzaar about sleeping it can exempt me from sleeping but not from eating?