No Not at all. It was customary for the Flyhalf to undertake the kicking duties however, there have been some notable other players who kicked and score. One was Welshman Alan Martin Lock forward of Wales and Aberavon who undertook a massive kick in the 70's and scored from a penalty
Rob Andrew
The 1st England scrum half was Josh Young
Number 10 - fly half
Fly-half Joel Stransky
yes hes a fly half
Chris Paterson
He played fly-half (out-half) mostly. He also played as inside centre.
He plays in Australia for the Queensland Reds
Hooker Lock Flanker Second Row #8 Scrum Half Fly Half Centre Wing Fullback
He really is.
as far back as he wants to
Dmitri Yachvili