Eh, I'm not sure I would say that. Someone can love/appr ciate and want something even knowing that procuring the thing has ethical problems. Desiring something isn't the same as being okay with the problems that come with acquiring it. It's the being okay with procuring a diamond despite the ethical problems and bullshit that would be a massive red flag to me.

For myself, I'd be having serious second thoughts about a relationship with a person who felt an expensive ring was somehow necessary. But merely wanting it, particularly if out of a sense of tradition or symbolism rather than as some silly signal of wealth, wouldn't perturb me.