Presumably this doesn’t occur if a female VC is giving that advice to females founders; maybe this will be an additional incentive to actually promote some women to be partners. VC is one of the most male-dominated professions around.
More generally, it’s easy to look at just the costs of a social change, without remembering to weight against the benefits. If this issue is one of the costs, and reduced sexual harassment of female founders is the benefit, then I would ask women who have been in this position how they weigh the two (having not experienced either I wouldn’t presume to know how much the benefit is actually worth to female founders, and since the costs and benefits are both incident on them, it’s not really my place to choose).
But I’d hazard a guess that most women would prefer not to get hit on / harassed as they fundraise, at the expense of sometimes not getting fully candid feedback.
If the resulting cultural is permanently clammier professional relationships between men and women.. I have a hard time believing it's things going right. OTOH, I don't really think there is a permanent "clamming up." Hopefully it passes. It's not like everyone was gender blind in 2015 either.
Regardless of what we think of wider issues, I think Femfo is probably observing something real.