Your point is a fair one, and I admit unfamiliarity with Corretto, specifically. But they're telegraphing, right on the tin, that this new service will indeed recommend solutions of the form "we see a problem pattern in your code; try Amazon _____". The fact that Corretto is actually open source further muddies the waters.
We'll need to see what comes out in the wash. Maybe the more OSS they encounter the more suggestions it will be able to make. Or maybe not and it will indeed be a sales pitch masquerading as a feature.
