No, that's not correct at all. I don't know why a segment of the fanbase loves stupid mind control plot devices (I guess that's why Blade is liked so much? :sweat
, but that's not a plothole at all.
It was a system introduced with that function, that would be activated if they stopped fighting worms, something that never happened. If it had suddenly become easier to activate than before, just because its existence was revealed to the viewer, THEN you'd have a plothole. Kabuto went through more than 30 episodes without ever having problems with it. Why should it suddenly be activated more often in the last 10 or so episodes?