Ridiculous. Why just CQC ranks? All ranks should provide "care" packs then.
All of the others
do provide some sort of reward for reaching them.
Exobio and Mercenary ranks unlock additional cosmetics at each rank.
Trade, Combat and Exploration ranks improve mission rewards, unlock cosmetics, and sometimes give access to engineers or permits.
CQC ranks give absolutely nothing, not even cosmetics (there's the permit, which is nice, but isn't tied to your Pilots Federation rank)
I don't think it would make a significant difference to player numbers if they did come with some sort of benefit, but being able to use your CQC rank as a decal, or maybe unlock the occasional SLF skin, would be consistent with the others.