Why do high pixels need to be output in RAW format?

High pixels are not necessarily in raw format. As long as the SLR camera supports it, you can take photos in raw format.

Raw format photos are relatively large, not necessarily pixel high, but there are many adjustable information recorded, which is the effect of a photo under different light sources. The pixel size of the camera is determined by the factory settings of the camera itself.

The photos that need to be taken later will be in raw format, so that the film production rate is high and time is saved.