What problem does this address?

Currently, it's possible to insert very large block patterns into very small spaces. This ends up making them seem very broken.

What is your proposed solution?

We should have some sort of logic that determines whether a block pattern should be inserted or not. For instance, when someone has a small column selected, don't show wide/full-width patterns in the inserter.

It would be interesting to extend that to themes as well. For example: if a pattern specifies that its preview viewportWidth should be 1800px wide, maybe that's an indication that the pattern shouldn't be available while using a theme with a 600px content width and no wide/full support.