Silver/Gold I'm okay with to help new players a bit more. Diamond though.. I would be fine if it was limited to 3-5x times a fighter. It takes a whopping ~10M EXP alone just to get from lvl 55 to lvl 60 so a little help seems good. (For context, it takes 26M to reach the maximum level of a Diamond character.)
That said, I'm totally fine without them since I like the grind and it feels rewarding to me. But I do understand why some people might find it boring.