"Critical like" abilities and bleed damage vs fortification

[Michael Grate]

A number of abilities as well as most things that cause bleed damage say that something immune to critical hits are immune to the effect. So how does fortification affect these types of things?

Precise Strike is the only one (that I could find) that calls out that items protecting a creature from critical hits apply here

Precise Strike wrote:

Any creature that is immune to critical hits is also immune to a precise strike, and any item or ability that protects a creature from critical hits also protects a creature from a precise strike

But then there are:

Bleeding Arrows

Bleeding arrows wrote:

Creatures immune to critical hits (such as plants and constructs) are immune to the bleed damage dealt by this weapon

Wounding Weapons

Wounding Weapons wrote:

Creatures immune to critical hits are immune to the bleed damage dealt by this weapon.

and Quivering Palm

Quivering Palm wrote:

Creatures immune to critical hits cannot be affected

How does this work exactly? Is the percent dice to ignore the extra damage still rolled in these instances or does the defender have to be naturally/magically immune for the rules above to take affect?