I assume by "high quality" your parent comment is referring to photo imagery on a photography oriented site. Even an 18 MP camera (which some phones have nowadays) will generate single images over 100 MB if they are not compressed at all.

Show me the camera who's sensor (<20 MP) spews out > 50MiB/frame.

Bonus if it's <5k$

Notice that I said "not compressed at all". My Canon T5i is a few hundred dollars, and when I convert the (compressed) raw to an uncompressed TIFF or PNG, it's over 100MB.

A 20 megapixel camera that outputs raw file would return about 60mb per image, as there are 3 bytes of data for each of the 20 million pixels.

Seems a little silly to have the defaults geared towards displaying images with 3-6 times the pixels that someone's monitor has.