I think basic formal education should be the right of every child. Basic formal education helps the child fits into the society and its every parents duty to give this to their child. Its okay to have an informal education, but every child deserves the basic formal education to help them navigate in the society and also help them to communicate better amongst their peers. Formal education helps you in reasoning, how to behave and many more things, so denying a child this education is denying the child a lot of things that will really help the fit perfectly well in the society, so I will always advocate for a basic formal education for every child.
Basic of formal educations for children is very essential as it builds a stone throw to illuminate the child's vision and then identifies or desires a dream.
The environments do have it own essence of impacting a child, it could be of good or bad morals. So disengaging the child's from attaining basic or formal education will live them at their childishness unaware about making responsible decisions but ending up in the streets due to lack of educative formations that's to project their mindsets from craving and optimistic towards building a carrier, either professional or skills. But yes, this basic educations are key elements that brightens child's optimism to decide what they want to be.
Denying them this essence is like letting them to grow in the dark while they struggles all by themselves when it's time to take responsibility or taking self decision considering what's best them and it's benefits.
If you can't take them up to the higher educational level, atleast that elementary stage is very important which as well exposes them to be familiar in some basics of life therefore, optimizing them to have bright visions for their own future even without owning a degree.