99.9% of hunters/shooters wouldn't know if their scope is reliable or if some other of the multitude of factors affecting accuracy is actually causing the problem; they have no way to test a scope on a bench or the desire to shoot a 25 yard travel test.
A fixed 6 power scope is all that is necessary if, as some posts reflect, shots are close and the target is large. It's also fine if you just want a cheap scope.
But on this forum we're talking about long range shooting and hunting. A wise person would look at the equipment used by those who care about hitting what they shoot at, like in a target game based in hunting scenarios. Everyone is shooting a variable power scope with some high end power. Setting up a long range rifle for hunting similarly will result in better success.
In the shotgun world the same applies. Taking a well-fit shotgun into the field that has been set up for sporting results in better wing shooting.
A scope limited to 6 power even equipped with turrets is hardly the best choice for long range
