I don't think this is dishonesty - it's auteur mentality. In Intel's view, AMD was a second-source vendor that went rogue, and gets to free-ride on their patents because Intel couldn't be arsed to extend x86 to 64-bit. If they had their way, they'd own the x86 ISA interface and all their competition would be incompatible architectures that you have to recompile for. Crippling AMD processors with their C compiler wasn't dishonest, it was DRM to protect their """intellectual property"""[0].

Gelsinger was the head designer on the 486, so he was around during the time when Intel was obsessed with keeping competition out of their ISA and probably has a case of auteur mentality, too.

[0] In case you couldn't tell, I really hate this word. The underlying concepts are, at best, necessary evils.