No more flex or twisted bars my a$$...
Hit hard enough and they will twist & flex, or maybe just break.
Nope, I wouldn't do it. I like my bars to twist in the clamps when I eat it hard. Keeps things from breaking.
Besides that, the rubber bushings are also there to provide a bit of dampening to the vibrations from the front end..
Sometimes it's best to not try to out think the engineers who design these machines.
However, it's your money, if you like the idea, go for it.