No, I am not. As long as there is a license required, ( we do not have Constitutional Carry in Texas) then having someone prove a minimal amount of proficiency every five years to maintain a license to carry is not unreasonable. Remember, one of the biggest advantages to a CHL is reciprocity with other states. If we lower our standards too much, we could lose that.
The level of proficiency required to qualify is so insanely low I don't see how anything could be lost between renewals.