We can't observe evolution over a long period of time because until much more relatively recently we have been able to properly document it.

To discount it entirely isn't really all that big brain.

Until something can be proven, we only have different theories. We cannot prove or disprove drastic evolution over that period of time.

In fact, even from a creationist point of view, the above statement that you responded to is silly.

If it's so fantastical to believe that "single celled organisms poofed into existence one day and evolved", why is it suddenly okay to believe that we were poofed into existence as whole humans?

I enjoy different theories and opinions, but I needed to touch on this point because we have a very large religious userbase.

Science is very interesting, and instead of "trusting the science", we should trust the scientific method. And the scientific method has not been employed long enough in civilization to properly observe and document any speciation anyway.

So TL;DR is: we just don't know. I don't want people to fall into the same pitfalls from the opposing sides of the argument. Evolution and creation also does not necessarily need to be mutually exclusive.

On a quick tangent on pitfalls: When society agrees on something that we have been unable to properly observe, we run into issues where we don't want to accept that we were wrong.

The big bang theory as one notable example doesn't make a ton of sense on its face. It wasn't the only theory, and there were better theories that made more sense, such as Plasma Cosmology.

But instead of properly exploring and asking these questions, and challenging it, society was made to accept one theory as the end all, and schools rarely if ever teach of these other theories, because no one wants to admit that people were wrong.

And yet we recently had an event that seriously detracted from the big bang theory. When we are (inevitably) wrong about the fundamental theory of universal creation, we will have missed decades of valuable research focus. Most research became complacent due to commonly accepted science that we could literally not observe.

They also fearmonger about the end of the universe, something that also can never be observed.

So, ultimately the point is this:

When civilization cannot directly observe something, the solution is not to just accept one side or the other, but to continue to teach young minds to question those theories for hundreds or thousands or millions of generations to come.

That goes for evolution vs creation, Big Bang vs Plasma Cosmology, etc.

When discussion dies on a subject, the truth will die with it until resurrected by something entirely unrelated like a new space telescope.