I’m not gonna claim to be an expert but this doesn’t seem true at all.Depends on the time of year but you can get moderates for as low as $240 a night with tax (that’s only looking at May and June 2024)
https://www.mousesavers.com/2024-disney-world-room-rates-season-dates/
Also comparing a higher DVC point period to the cheapest hotel period is false equivalency unless the timeframes match up which they are unlikely to do.