It does matter why the competitors say this. Of course it does. Reusser is openly saying she hoped PFP wouldn't win the Tour! You can't simply separate that type of pettiness from the message she's purportedly trying to bring across, a message which is all the more hypocritical consering her own weight loss.I can't agree with you. But even if we say we agree: it completely distracts from the topic. It doesn't matter why one of the riders said something. The topic is too serious for that. And it's definitely an important issue. Weight often plays a role in sport. Unfortunately, it also often makes people ill. And what the Tour winner did is not healthy. This can have serious consequences, especially for women who are thinking about having children. That's why you shouldn't distract from the issue. The signal is: do the external like the Tour winner. It can bring success and it is “normal”. It is not. Especially as many people don't have the support or can't manage the diet temporarily.
Of course, this also happens in men's sport. Weight is also important for mountain bikers. A stage winner from the actual TDF is certainly also in the critical range. In general, however, other types of riders are currently in the lead among men and the issue is probably not quite as big.
You have these two taller than average cyclists (Vollering and Reusser) who will in a professionalizing women's peloton have difficulties trying to follow the smaller riders on climbs. That's only normal. You don't hear Ellen van Dijk complaining about these pesky climbers with their unhealthy diets.
To say that what PFP did is not healthy is a very dangerous statement, since you don't actually know what she did, how she did it, how much weight she lost, how it was monitored... you only know that she looks rather skinny. To say that this sets the wrong example for regular people is similarly pointless. It's not advisable for a regular person to suddenly ride a mountainous nine day stage race either.