The examples you cite are two of about 9 million species. Even the ones who hoard food like squirrels feed others like ground hogs or mice. Spiders webs are scavenged by birds. Those killer whales that kill for sport feed something else. But I'm afraid you lost me at "assuming humans are somehow unique is false". While most animals have some similarities the human mind is totally unmatched at least on earth. We can foresee and plan for the future which includes the acquiring and hoarding of wealth on an unprecedented scale or if we choose we can share it. I agree that some animals do that on a limited basis but it is out of instinct not intellect.
What is instinct but intellect distilled into some type of memory. Just because they dont actively think about it, doesnt mean there isnt an intellect behind it.
Bees and honey, any grazer, any animal adapted to survive changing conditions will feast at times to survive the famine that follows. That's what I believe capitalism is similar too. But like I keep saying that means going thru lows too. You cant break the cycle like we have with socialism. That's where a lot of the greed is. We dont ever want to suffer, that's as simple as greed ever gets.
We dont want to deal with the reality so we just use socialism as a magic wand to ignore the issues still out there.
Look at the most famous pandemic. Huge societal and economical changes came out of that because the artificial control of monarchs was weakened. With either rulers losing their serfs, or serfs losing their lords. There was more freedom and it lead to one of the biggest spikes in production we have ever seen. Especially considering it didnt come with a technological boost. Within ten to 20 years they were producing more, and were wealthier, healthier, etc, than before the plague. Even though population was still down. The taste of capitalism, freedom, allowed that to happen. But it took the major dip to allow that to happen.
The point is that the process is allowed to happen completely. Whether thats a completely natural process, and animalistic instinctual process, or capitalism.
Literally everything is built on cycles. Cycles around the sun, cycles of season, cycles of life and death, good times and bad times.