I agree, the call bell is there for the convenience of the passenger and ease of the crew.
The only time I dont like it being used is for things like drinks or food when we have just taken off, out of our seats and trying to load meal carts and set up drinks carts. Food and drinks will take longer to come should they press the call bell and we are taken away from doing those jobs.
Those requests at that time aside please utilise it!
