It could be. But let's say you divided it by 100. The current would increase by a factor of 100 and the entire circuit would burn itself out.If the resistance of the heater is halved then the current is doubled (assuming same voltage power supply).
This means that the power is doubled....doesn't this suggest that lower resistivity is an advantage?
In general, you are looking for a specific heat output for your heating element. So if you used a material of lesser resistance, you could use a thinner or longer piece to get the same resistance and therefor the same power (heat) output. But if you pick something with very low resistance, this can get to be a problem. If it is too long and this, it may be too fragile.