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Curios why prusik shows up so many times? Outside of some rescue training I've not ever used one. Tree stand hunters? I mean, it's useful and all just not something I've needed.
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Instead of thinking of it as a climbing knot, think of it as a positioning knot.
For example, you have a tarp, with a ridge line. You use this tarp wherever you camp, but sometimes trees or whatever you want to secure it to are different distances away from each other, or relative to the area you want covered with the tarp. With prusiks secured to two corners of the tarp and wound around the ridge line, you can hang the ridgeline anywhere you want, in any conceivable orientation it's length will allow, then move the tarp exactly where you want it and set tension on it that's independent of the ridgeline's tension.
That's just one use but the most common for me.