I don't understand why AMD doesn't cooperate with Intel to push SYCL as the standard GPGPU and heterogeneous programming method. Intel is good with software, SY

I don't understand why AMD doesn't cooperate with Intel to push SYCL as the standard GPGPU and heterogeneous programming method. Intel is good with software, SYCL is an open standard so both companies would benefit from the same code, and customers could run SYCL code on Threadrippers if they wanted (some of them are as fast as some GPUs now). Is AMD trying to create their own proprietary lock in eco system? Why aren't they committing to cross platform open standards?