So crash forces are hard to understand. Hitting a tree 18" wide is very different than hitting a granite wall twice the width of your truck.
In my mind your creating an upward bending motion on the frame in the event of a serious head on type of collision.
The problem I see with that is the possible relocation of the drivetrain. Bend the frame far enough and in a split second your engine is moving on its own.
The importance of crash safety was not super high when the square body Blazer came out. I don't think there is much you can do to mitigate forces enough to prevent some level of injury.
But there is alot you can do to prevent deflection of the basic structure surrounding you and your passenger. If the structure surrounding you collapses your liveable space contracts.
Now beyond all of that in the much more likely event you nosedive over something hard due to misjudging a jump or incorrect brake or throttle application while in the air, put that bumper into its digging mode I can see it bending and moving around. In that situation you have increased the chance of bending your engine bar.
So in a nutshell I just don't think there is any injury mitigation due to that bar bending. So many other things will be bending the force will still be transferred.
Tighten up the belts. You know like take a deep breath, let it out, then pull them belts tight.