Kama raga will keep one bound to kama loka, that is to say with a heavy body, sickness, aging, physical ailments, the need to work … A gathi suitable for kama loka or lower realms can be cultivated or newly established. As long as a being acts without good comprehension of the tilakkhana, avijja and tanha are strong. Thus the lifestream is still in danger to fall down to the apayas.
Also with kama raga one is “closer to the apayas” compared to a brahma. One will make “mistakes” and accumulate more akusala kamma, just to have sense pleasures. It is not easy to figure out which kamma one accumulates while doing “normal” deeds in kama loka. Just maintaining of enjoyments can prepare e.g. a peta bhava.
The coarseness of the rupa for sense pleasure is also an indicator what type of gathi is cultivated. We are here in kamaloka realm #5 to experience coarse rupa. The other side of the coin is a heavy body, sickness, etc. Getting rid of kama rage will send one to higher realms with less dense bodies and more refined experiences.