RIA's offer this kind of custom constructed direct indexing as a value add, so there's clearly a market amongst the broader non-active-trader types.
I bet you could lean into the huge and growing ESG (
Environmental, Social, and Governance) sector, because people have very different opinions about what "good" and "bad" are. For example most ESG funds are heavily weighted to social media, but maybe you think oil and social media are both bad? There isn't an easy to access product for that.