Does Vitality Increase Defense Scaling?

there was a youtube video saying it was (because power and size do with certain things.)

power increases damage and size increases size
defense just increases health, they aren’t that complicated (vitality just adds to your total HP, doesn’t affect defense as a stat in any way)

no because it would be incredibly painful if a warden had 2k base hp and 7k base hp with armor (jeez man)