I mean were talking about skin and tissue it will bend and stretch when it comes in contact to pressure. Also energy depends on mass not just velocity/speed. It would need to have a large enough energy while being precise enough to not be distributed over a surface to penetrate and damage tissue.

do you know why bullets penetrate tissue, its because it has a large enough kinetic energy fixated on a very small region of area. Similarly light that is emitted by a radioactive source penetrate and damage skin cells from the same principles.