Yep, conceptually the idea makes sense, good question, but the balance wires may not be large enough to handle a significant imbalance with large loads. Full scale lithium E cars are typically connected this way, but the relative load is much smaller (Range is an issue, but they do go longer than 10 minutes or so)
In any event it’s best to somewhat regularly check pack balance when starting charging. Lipos are relatively cheap and expendable, shouldn't be using packs with balance issues anyway. Especially in a high draw use.