There's a gap between an overture which gets a “yes” and one which is unwelcome, within which an overture is acceptable and will not adversely impact a relationship even though it is declined; how wide this gap is varies by individual and context (it tends to be particularly narrow, and sometimes of negative width such that there are unwelcome advances that will be met with grudging acquiescence, where the recipient is on the downward side of a power imbalance) and, I suspect, is on average in our present society much narrower for women than men (becaus of, at least, general social power dynamics rather than necessarily any inherent gender feature.)

While obviously one will prefer that the answer be yes to any overture (even an implicit one), I think that—particularly with the kind of subtle, implicit, preliminary overtures that are used to gauge interest before an explicit overture is made—the thing a savvy individual will want to be certain of is that the overture will be within the permissible range irrespective of whether it will elicit a positive response.

I think a lot of the problem (other than active malice) comes from people not recognizing the effects of context and lacking empathy and thus projecting their own broader range or permissible-even-if-not-interested onto the recipient of their advances.