The biggest difficulty is coordinating this approach with other parents and institutions - it is punishing to be the only kid without a smartphone when peers (and increasingly, institutions) require you to have one to participate.
But that issue aside - it is still strange to allow for this class of products tailored to kids but parents are just supposed to universally agree should not be bought. There is clearly a society-wide issue here that we've left for individuals to solve. Predictably, it is not going well.