This is my guess now: yes, Intel is a massively profitable company. But I think what the market is factoring in is that it missed the technology shift to smaller chips (5nm?) which its competitors (Apple, TSMC, etc) are able to do. Further, Apple & ARM are eating into the mobile space, and AMD and NVidia are biting away at Intel's data center share.
I think without a major tech break-through, Intel looks like it might miss this next semiconductor shift, and that's why the market is selling because it is starting to look like an also-ran at this point. Think IBM.