Disagree. In this case I think the additional strength he has because of his weight is more beneficial than not.
If I was a fully matured 95 pounds I would agree with you. But the reality is I was a 95 pound boy who hadn't hit puberty.
I think Bolt with a 2:10 PR is physically capable to running sub-5 without any mile specific training.
My biggest question is whether he would be mentally capable. The feeling of running a mile hard is something he very well may have never experienced in his life and would most likely be very difficult for him to cope with.