One of the most important competitive advantages in modern world is motivation to do things on your own. And all this tutoring that kids are forced to be doing by adults is killing it.
It's why the rich don't manage their own money, make their own food, clean their own house, or care for/teach their own children. Instead they pay other people to do it for them.
.. but if you don't have that?
Besides, tutoring can be a bootstrap to that, especially in young people. I've found myself that exercise is so much more likely to happen if it's not on my own, such as a regular personal trainer appointment. The more it becomes a habit, the more I feel like doing some more on my own as well.
The problem with most kids and adults I know is they either lack a depth of reasoning for why they ought to be doing something better, or lack the confidence that they'd be able to accomplish it if they put their mind to it.
If you can't come up with a convincing "why" for them, then you should reflect on how sustainable forcing them to do that thing will be once they have independence.
There were a lot of things my mom expected of me (similar to these kids with tutors). Some of them I agreed with, some of them I didn't.
When I finally got my independence at 18, guess which ones stuck, and which ones (where a lot of time and effort was put into cultivating them) evaporated?
Talk to your children deeply about the why, and, as the saying goes, they'll suffer almost any how.
Unless they are uber-wealthy, then they'll just say "Johnny is sailing our yacht around the Mediterranean (and when we say "sailing", we mean there's an 8 person crew running the boat)"
What is being purchased is the right to feel that they worked hard enough to deserve what they are certain to get anyway.
In any case, to my actual point -- discovering those motivations is one of the things for which I was paid. Often, children do not understand education. It has been a flat "do this" chore for them with some nebulous payout that will supposedly happen twice their lifespan away, when all around them they see images of people who did not go the conventional route to success.
What you want is someone who works for the child, not the parent. They should have a rounded education but also be willing to admit that they do not know something and must research. They should understand a decent amount of child psychology and how people process/retain information.
Finding folks like that, I dunno!