Hmm, interesting. And a "Misconceptions" section might also help immunize readers too. I wonder if the WP community would find that acceptable? K-12 teaching has been increasingly dealing explicitly with misconceptions, so at some point it might become unremarkable. I'm afraid a sentence or paragraph in isolation, would eventually be edited out.

Checking my personal touchstones, WP currently has the color of the Sun correct, yay. Though there's a bogus " spectral class. As such, it is informally and not completely accurately referred to as a yellow dwarf (its light is closer to white than yellow).", misunderstanding what spectral class "yellow" means, and then creatively flailing to reconcile that. On Stellar_classification, the Vega-relative chromaticity background colors look wrong, which perhaps doesn't help.

One challenge is handling incorrect graphics like [1] (that Planck curve isn't going through white, either from broken code, which used to be common, or there used to be some incorrect math on the web). The graphic is used in many articles. But there have been several such over the years, correct and incorrect. So adding comments to the graphic won't help long-term. I suppose a Misconceptions section could be added to the Chromaticity article, in the hope that the next person to swap in a pretty but incorrect chromaticity diagram, might notice that, as they haven't noticed the associated Talk. Might work? Or, hmm, setting up some later reader to recognize the problem, and giving them the confidence to fix it? Focus on facilitating repair, rather than on prevention? Intriguing.

Correctness seems socially hard. I saw an high-profile OER intro astronomy text, that was obviously written thinking the Sun was yellow. All the graphics have it yellow. But text sections dealing with color, were seemingly edited just enough, that through ambiguity and incoherence, the authors could say "we didn't say that - we don't have it wrong", even if there's no chance students were surviving that minefield intact. As was pointed out to them, on their nice public errata ticket system, and closed as WONTFIX. An important part of why science works, is people fearing being embarrassed in front of their colleagues, but for reasons I don't understand, problems like this don't seem to trigger that, so even long-term, they don't get fixed. If one could figure out how to dial up the embarrassment, that might have a broad non-trival impact on the quality of science education content.

[1] https://en.wikipedia.org/wiki/File:PlanckianLocus.png