@DarkWitchClaire I though because graphics sometimes made use of the blurring to fake more colours or transparency. IIRC a lot of PC-88 games look like shit without CRT blur or something approaching that.
@BatElite it's different than a crt filter, i mean the filters that look like someone smeared vaseline on their tv
@BatElite probably, but crt filters don't seem hard to do (sort of) right and the smooth filters look horrible compared to regular pixel scaling