It seems to be less important the longer I train.
I get essentially everything I want from a competition (which is mainly rolling with other styles) from dropping in at other gyms. And the more I train, the less surprising different gym's game is.
But I always learn some new items at each gym.
I'd say if it's important to you to really be great at the implementation of jiu jitsu then competition is pretty important. As a hobbyist and someone who finds joy in BJJ through learning BJJ I have fun adding weapons to my arsenal, or tools to my tool belt. If you want to sharpen the spear or sharpen the knife though competition is probably pretty important.
I get essentially everything I want from a competition (which is mainly rolling with other styles) from dropping in at other gyms. And the more I train, the less surprising different gym's game is.
But I always learn some new items at each gym.
I'd say if it's important to you to really be great at the implementation of jiu jitsu then competition is pretty important. As a hobbyist and someone who finds joy in BJJ through learning BJJ I have fun adding weapons to my arsenal, or tools to my tool belt. If you want to sharpen the spear or sharpen the knife though competition is probably pretty important.