For me, it's not the case, but it can be for you. I would say it's different for everyone. For some calprotectin is very useful for monitoring. My doctor pays more attention to my symptoms rather than lab results, I find it especially helpful to have an ultrasound of my ankle or toe joints as they are inflamed from enteropathic (Crohn's) arthritis, so there is still inflammation going on then.
I would talk to your doctor and tell him about your symptoms. There are also other issues that can occur during or after Crohn's that mimic the symptoms, e.g. SIBO or other things, just talk to your doctor.