I pretty much agree with you, but keep a couple things in mind.
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Soybeans are also a nitrogen fixer, and thus often planted in rotation with corn anyway. Their replacement would have to be also.
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Even relatively small farmers can have a million dollars invested in the equipment for planting and harvesting soybeans specifically—equipment which I'm sure is now taking a good hit in resale value. Mainly I'm talking headers, though there are so many little attachments on combines for different crops it makes your head spin. Seriously, I was just on John Deere's configurator for one of their lower-tier models, and wowsers.) ^(…obligatory don't buy a Deere!)
TL;DR: While it's true that the majority of them should have seen this coming a long time ago but didn't, but short term it's not as simple as just "planting a different crop." It'd have to be a crop that they already have the equipment for, which is also a nitrogen fixer, and has comparable market demand. And, if such a crop existed, they would have planted that in the first place.
TL;DR the TL;DR: geez your attention span isn't that short, educate yo'self. 😅
I agree, six words is short.