She posted a comment on her social media focusing on this feedback as "criticism" that came from a sexist guy "of course". It was pretty easy to draw the line to the three panelists, one of whom was a guy. Ouch.
In a previous life, I'd worked in a awesome (female led!) product company. While I had no experience prior to this, I quickly realized that the product itself and its quality etc was almost irrelevant to success, the X and Y mentioned by the male panelist was unfortunately everything, which you'd only know if you were in the space itself. The female led company I worked for was bought out by a (male led) competitor, who then using much strong x and y skills - cleaned up. Company I worked for got basically nothing.
Fast forward - my friends business not doing so great, she asks me for feedback. I said nothing other than enthusiasm. Partly because I was really enthusiastic - she'd put her heart into this project. But her comment on social was in my mind - I had no desire to be next sexist guy "shooting down" an idea
She's out of the business I think mostly. Anyways, this parallels the take of the article.
Obviously you didn't post the feedback, but I wonder how this was phrased. If the feedback was "improve X and Y", I think I sympathize with the panelist. The feedback was solicited! If it was framed as "unlikely to succeed because inexperienced in X and Y" then I think that crossed a line from critical feedback to a somewhat demeaning comment, even if it was right.
Regardless of how it actually played out, there's a good lesson here that you should be mindful of how your communication is understood. It's not enough to be right, it's important to speak in a way that makes sure what you're conveying is delivered in a useful way.
People need to think about it in terms of incentives, what incentive do I have to try communicating with an incredible mindfulness and scrutiny that I might then fail at. The failure to do so properly could have potentially endless downsides? The default incentive is always going to be avoidance as much as possible. Not because of any desire to be sexist, but because is the instinctive path of least resistance.