I don't see what's wrong in being upfront about what you want and facilitating that. It keeps the process simple and works as a pretty good initial filter.

While you're talking about the melting pot in the western world, it just so happens that eventually most whites end up with just whites, and blacks just blacks. Most beautiful women end up with rich men, and religious people end up with religious people. Long term "melting pot" relationships aren't as common as you think. If sexual selection eventually filters all but those common traits, why not be blunt about them?

E.g., while the Indian dating sites you talk about bluntly list salary, western sites use complicated proxies (like interests == international tourism, or your profile photo with a tesla you own).

That dating has to be complicated and subtle and what you need has to only be "hinted" isn't any better than being blunt about what you're looking for, and being blunt about what value you think you'll provide to the other. At the least, you'll have saved time and heartbreaks.