geologists could also tell you where the best rocks are.

FTFY

Also where the best places to build your large hadron collider or similar are…

What’s the context here? Like should you care about it to learn it or do you mean if you should oppose any resources being directed towards anyone learning it?

If it’s the latter, it doesn’t matter. Plenty of animals survive fine without understanding any of those topics you listed, and more importantly, the rest of us get along fine despite those animals not knowing any of it and we’ll be fine no matter how much you know.

But for the second one, geology (and its related fields like paleontology) is basically the evidence of natural history on this planet. Everything we know about pre-recorded history comes from geology, from what we know about how the planet formed and how the planet and life on it evolved. We can use various dating methods to determine the approximate age of layers of rock, and then determine that anything embedded in that rock is at least that old (though with some exceptions, since there are processes that embed newer rock in older rock). We know that dinosaurs existed because of geology, that there were once insects with wingspans greater than a meter, and that they predated grasses and flowers.

They also let us determine more information about recorded history, which can sometimes be more political or religious than historic. Thanks to geology, we know that, while most areas on the planet have experienced major flooding at various times, there has never been a worldwide major flooding event during human times. But we do know that the sphinx is in an area that saw flooding since it was built and that the Sahara was once lush instead of barren during human times. It’s been used to determine a timeline of how we spread through the world, and to understand that we (homo sapiens) weren’t the only or even the first humans to do so.

Or, on a more practical side, geology can be used to get an idea of what resources are under the ground without needing to dig them all up first. It also can tell us how stable the ground is in a given area, like should buildings be designed to withstand major earthquakes to survive 100 years? Or should the entire valley be avoided because there’s an active volcano that might not erupt tomorrow but might so so next week. Or even understanding that this volcano is one you don’t want to be anywhere near when it goes off, while this other one will be a cool tourist attraction when it does.

And it’s currently being used to figure out if there was life on Mars or if it was even possible in the past.

Personally, I like understanding the world a bit more. Instead of rocks just being rocks, they are a sign of what was, of how much the world changes over timescales we can only imagine. That cliff needed to be deep underground at one point or it would have only been a hill, and that mountain rose up because it was pushing against other rocks and ended up going up, maybe with those rocks or instead of them. This canyon exists because glacial lakes would form as each glacial period came to an end and eventually the ice holding that lake together would melt or break, allowing that water to flow and it carved out this massive channel maybe in a matter of days or hours as that water swept everything on its way to the sea.

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That’s fine, you don’t need to know stuff about every single subject. The important part is that SOME people should really be studying this stuff. As it can reveal very important info about the places where we live.

I dont know geology and ive had a happy life, no regrets.

The geologists lick rocks.

No, that’s what the animal behaviorist got.