It just needs to be kept to a minimum, and the PCs are not necessarily the characters with the high skill 5+.
If chargen is played out by the rules, not house ruled in anyway, and the hard survival rule is used, you'll still get the occassional lucky run of dice resulting in a character with skill 5+.
I think that's fine. It's when each character in the PC group has at least one skill 5+ skill that there is a problem.