I think it's a good idea. It's better than rapping about murder, fentanyl, and premarital sex.
I was pondering this earlier , but I think rap can be about literally anything from filing-your-taxes, to mundane weekend adventures ; so I don't see why we need to let it be what it currently is. I mean we had people like Macklemore make hit, global singles about going shopping at goodwill , so anything is possible. You see those Asian kpop acts do similar things too, but still command a global audience.
I also don't think relatability is important either cause most rap listeners (both black and white) can't relate to damn thing a headliner like lil baby or city girls raps about; but they still find it interesting. So subject matter can be vast and positive.
For example, imagine a sub genre of rap about some ordinary sht like going traveling. No mention of drugs, fancy cars, or degrading women. Just simple travel. I think individual verses from Future do this but imagine an entire album devoted to it. Or something else, like cooking or childrearing, or working life, etc.