Grubs > Fleas is an objective, in lore fact. Grubs are so precious that there exists a super powerful being whose only goal is to collect and examine the Grubs. He owns an entire tower in the capital city of the kingdom where he ogles and tickles and does unspeakable things to Grubs. Because they're that precious.

There is no one who cares about the Fleas even 1/10th as much as the Collector cares about Grubs.