There's a reason why non-Force users don't use lightsabers, and why Jedi don't use blasters.
Lightsaber skill = Force strength
Bobba Fett, Cade Bane, General Grievous, and a host of other non force sensitive individuals have used light sabers.
The nobles of the Tipani Sector used the light foil.
So no, force power is not a prerequisite for using a light saber and the Jedi are more than willing to use a blaster if the need arises. Most of the New Jedi Order carried both a blaster and a light saber.