The formula has no conditions, it is a universal formula, meaning if an object has a mass, and a velocity the force will be determined by the impact time.
It's a formula that's been around for years with plenty of proof to its application.
I'm sorry you're so worried about this.
Not worried about the formula at all..... just worried about why you have avoided the simple question as to whether it would apply equally to pedestrians.
Your avoidance and waffling about cars is a pathetic red herring.
Now we all know that you will not answer the question, and we all know why