So containers run on air I take it? No, RHEL isn't being killed, but you're not going to see it as base image for your typical GitHub project. In the enterprise though, where security is tight, no one is going to build containers based on Alpine which is maintained by what, 10 people? Their customers are banks, governments, etc. which will happily pay for what they provide.
Alpine as a base image is perfectly fine; it is a tiny base system after all.
RH base image is also relatively small (compared to full RHEL system). It is also completely useless, as you cannot dnf install anything while building the image, if you do not have access to RHEL repos. If you have to bring in your own packages, you might use Alpine just as well.
I woould also contest your claim about "happily pay". No, the payment goes after the sales folks do their job, which isn't easy either. There's nothing "happily" about it.
