That's a philosophical statement, not an Objective Truth.
It's the philosophy that with enough force, all schemes and cheats and lesser powers are without meaning. Technically correct, but the fact it locks our Truth influenced Immortal Ascension and shoves us bodily onto the Titanic path should be telling. Might doesn't respect its master, Truth, or any higher ideals, and will happily betray you for a more suitable holder.
And Kong is quite literally the ultimate distillation of Might.
The fact it's only temporary makes it worse Not better. Since the temptation is persistent, but the power boost is strictly finite, permanent effects are the purview of Grand Diagrams.
We dunk on the fates, but risk Kongmaru using his spatial nonsense to sail in and squish us during the cool down. This is a very real possibility.
Because the last thing we want is a transcendent schemer being corrupted by an ultimate temptation that strips him of his idealism in favor of twisted self gain.
Since he, if anyone, might be able to straight up steal it. After all, he's optimized to exploit the gaps in Might.