Photoshop, Illustrator and similar graphic design software are in general bad at kerning. Why does the computer find it so hard that we need to manually go through headlines and text just to get it right?
Applications don’t kern by default. The font files have internal kerning data. Application read the internal kerning data and display that. The cheaper the fonts, the worse the kerning tends to be.
Default kerning is a direct result of the font file and is not the fault of any application using that font.