hence .... they are instead sold the notion of "ok you are not happy now, but you will be in the future"
But in my experience, theism is like that too - "ok you are not happy now, but you will be in the future". There is this constant putting off of any shred of happiness, meaningfulness or satisfaction.
On the contrary, that's the exclusive deal of atheism and their willingness to accept is simply a consequence of having no other option . Kind of like saying the deal is that everyone only gets to eat cactus and camels are simply more willing to accept it. I guess the difference is that even atheists are mostly trying to avoid it as opposed to the camel relishing the taste of its own blood.
How do you know what camels relish?
It seems like you are heavily projecting your own ideas about what things are like, into/onto animals.
It's not like you have spent a lot of time with camels, studying them. Or have you?
It's like some other ideas I have heard from devotees - that dogs eat stool because they have such intense hunger and no discrimination; or that pigs refuse to eat sweets because their sense of taste is so off.
A flea larva eating stool and an animal like a dog or cat eating stool, is not the same.
Dogs, and a number of other mammals, eat stool in order to replenish their intestinal flora, which had been compromised by insufficient or poor nutrition, intestinal parasites, or, as is typical for domestic dogs that are fed canned food, by preservatives in the food that kill intestinal flora. Without proper intestinal flora, an animal cannot digest food.
The same principle is used for humans whose intestinal flora had been compromised by use of antibiotics: they take the stool of a healthy person, distill it, and introduce it to the patient's stomach via a tube through the mouth and stomach (to avoid the acidic environment of the stomach that would otherwise kill much of the intestinal flora).
Not all animals have the same kind of digestion enzymes as we do. And some animals actually have a sense of what kind of food they can digest, and what food would just make them sick. Pigs, for example, seem quite smart in this regard (unlike cows, cats and dogs).
If one has lived with animals for some time and has studied them, along with comparing insights from other people who have lived with animals, one can notice that they aren't simply stupid or greedy or generally lack discernment.
Since the thorny plants that camels eat do not kill them, I imagine there is a good reason why camels eat them. Such as that there is no better food around, or that those plants contain nutrients that camels cannot easily obtain otherwise, given their habitat.
even outside of issues of religion, faith in a result renders 90% of everyday life doable
Sure.
But simply having faith is no guarantee that the invested effort will lead to the desired result.
It begins with simple acts of charity, since even a commitment to sacrifice runs against the grain of entrenched egotism afforded by a materialistic view (of course there are various ways egotism can hijack the act of charity, which explains why humanitarianism etc is hardly perfectional)
While an atheist can certainly perform acts of charity, that won't likely give them any sense that they are doing something specifically theistic; so from the atheist's perspective, charity isn't a gate to theism.