[At least where I'm at] it's kind of hard to find good tea. Like there are 400 cafés in the city that serve single origin beans with latte art, but I only have one local shop where I can get decent loose leaf. If I end up drinking the stuff from the grocery store, I probably will put sugar in it.
As a kid I always hated tea because when my dad made it, it would always have an obscene amount of sugar. It blew my mind when I tried someone else's tea with a little honey and milk, that shit's SO good
It is a good way to use cheaper tea like the tea bags that only contain tea dust. A cup from these will be rather bitter but it can taste nice once you add milk and/or sugar.
I tend to drink it like that. Apparently it's not socially appropriate to drink hot sugar water, and I need the sugar.
My secondary issue is that most tea available now is quite crap quality. I don't need sugar in good tea, but good tea is not trivial to make, and requires good tea to work with. Failing that, masking the poor flavour with sugar helps.
A smidge of honey or nothing at all is the way to go. If you need to put a lot of sugar in the tea, you probably brewed it wrong (or it's just shitty tea).
Depends on the tea. An East Frisian blend, for instance, is intended to be drank with some rock sugar – not a mountain of it, of course, but the sugar is an integral part of the beverage.
Stash makes good tasting Tea. If you're into Loose Leaf - they're all usually strong. But Lipton makes weak ass shit. You'd need 3 bags and then it just turns bitter.
A teaspoon or less of sugar, honey, or other sweetener I find both pleasant in my tea or coffee, and that it helps to support and express the floral and fruity flavors of them. I also sometimes like a little cream or milk, which can soften bitterness or help support certain spices (masala chai without cream just isn't the same!)
People who are snobs about it are ridiculous, doctor up your beverage however works to enhance your joy of it. I try to keep my sugar down but you could add 2 or 3 spoonfuls to a big mug of tea and still not come close to how much is in a coke.
(Edit: the comic is cute and funny! People who are preachy about tea are also ridiculous. Sometimes you just need a diet soda or an energy drink for breakfast!)