Yeah it’s true. Though with weather its more egregious, we have a huge dataset to test weather predictions vs weather results against, to test the accuracy of models.
Our ability to test election forecasting percentages is limited to a dataset too small and too different year-to-year to call it tested. So, it really is much less grounded in empirical reality than weather forecasting. It’s mathematical voodoo, in my eyes closer to numerology than science.