I personally have no reason to see my diabetes nurse, which is arranged annually. So far I have always gone, but if things continue as they are I may decline in future. It isn't compulsory.
I do, however, see a good reason to attend the blood letting sessions, currently every 6 months. At my surgery the blood letting sessions are done by letter invitation and I get a letter every 6 months. I have the HbA1c, cholesterol, full lipids, kidney & liver function, full blood count, serum bones for calcium etc. and my urine is sent off for lab analysis for protein. On my last visit I was also given blood checks for B12, Vit D, ferritin, iron, folate, GGT and thyroid. The full works one might say. I keep all these results on a spread sheet and compare them. Any nasty downward trends and I would be called in by my GP and if not, I would go see her anyway.
I may add I am in excellent health with well controlled BS as per my regular and frequent testing and a Libre sensor from time to time, but it is good to know that my 6 monthly blood tests confirm I am in good health. I regard the kidney/liver/FBC/urine/GGT tests essential. The rest more out of interest.