Paul Farquhar
Legend
I can confirm this is true, at least for 1st edition PF.And it appears that PF, from what I see, also has the base classic lawful stupid paladin.
But the Paladin had over 4 straight decades of an exceptionally strong class identity, while it has 4 years of a 5e identity. So it's hardly surprising that people often import older ideas into it.
It may be understandable, but it doesn't make them any less wrong. It should be enough to say "the paladin isn't like that in 5e". They can then go away, check the rules, and accept that it has changed.