For me it's simple, I will only hire a tutor in case my child needs to catch up, not to push my child ahead. I had maths tutoring as a teenager (16-18 yo) and that's all, needed it as grades started to slip, but passed my national maths exam (at pre-university level) so was worth it.
My oldest daughter had a year of Mandarin tutoring as she was put in Pathway 2 (at ESF) and lacked confidence and was struggling to keep up. She's fine now and able to keep up by herself. She now follows Maths at Enopi / Eye Level as she's in the bottom of the middle group at school and struggling and we want to avoid having her slip down in the bottom group. Once she's fine, she's fine as I don't plan to spend money on tutors unless my child is behind and needs to catch up. Every child is different, they can't all be doctors and lawyers (or any other stereotype), they need to find something they love and they need to reach their fullest potential, which is different for every child.