I do tell them that. I see no reason to be memory unsafe.
It is a huge uphill battle to become a new general purpose language, and the smallest thing can kill it. The fact that Zig is memory unsafe means that I, who am not a bleeding-edge adopter, but am an early adopter and in a position to make decisions about what is used at work, have disqualified it and lost all interest. I have no use for such a language for greenfield projects. Simply offering a more convenient onramp to the sorts of problems that C has is not a compelling value proposition for me.
I extremely strongly suspect I am not even remotely alone.