The trickery is the hint that it is bug-free.
Kashrus certification for nuts approves Ma’asros were taken, but proper bug checking is too expensive (I would blame the minimum wage). So some hechshers will state this on the package explicitly, and others, including Chassam Sofer [Bnei Brak], will not, assuming the consumer knows enough to check for bugs himself (just like grocery stores used to sell Tevel produce once upon a time). But when these nuts are covered with dough or chocolate or puffed rice or salt, this implies the nuts were already checked for bugs, and are ready to eat.
To see this more clearly, imagine someone selling fancy platters of delicious, freshly carved and sliced fruits, and not mentioning they need to be washed from truly dangerous pesticides…
And these rabbis are the ones we trust to look out for all the issues we are not even aware of?!