It's not a weird take for creators trying to make a living, I can guarantee you that. I don't know if you've ever tried to sell anything you've made -- whether it be an rpg supplement, a painting, heck, even pies at a farmer's market. I can promise you that every single person who sells the products of their labor and imagination has heard some variation of: "you want how much for that?! My five-year old could do that in their sleep."
I own a custom cabinet shop IRL, which alread self-selects for a certain price point, but every month I get people reach out to me asking me to price stuff and then act amazed at how much things cost. For awhile I tried to make a living building furniture. I was pretty good, I think. I was juried into the Smithsonian Craft Show two out of the three years I applied. It's harder to get into that show as an artisan than Harvard or Yale. I was selected to show at the Philly Museum of Art show as a Best Emerging Artist. Do you have any idea how hard it is to make a living building furniture? Even super high-end stuff? Virtually impossible. You design and price something and the client looks at it and says "Oh, that's too much. I can find something like that on etsy for 500.00, and they'll throw in free shipping." There's a reason I went back to doing cabinetry, because it's easier to make a living doing that than one-off, high-end furniture.
It's just as hard to make a living writing rpg products, to the extent that the vast majority of people who do it are either barely making minimum wage or do it as a side gig. Even Kevin Crawford, who I hold up as one of the exemplars of rpg publishing, doesn't write for a living. Especially now, with the advent of AI threatening the literal livelihoods of people who depend on their art for a living, I don't think defending someone's right to price their work what they need to make a living wage is too much to ask.
So, yes, I am sensitive to people criticizing artists for how they price things. Like I said, there's plenty to be critical of Gillespie for without resorting to critiquing how he prices things.