> Except labelling data, correct ? which is non trivial effort. Choosing choice of labeling is a RL problem too. If you're choosing environment actions to lea

> Except labelling data, correct ? which is non trivial effort. Choosing choice of labeling is a RL problem too. If you're choosing environment actions to learn how the environment 'labels' them, that's the classic topic of 'how do we make DRL models explore' well (and arguably is the Achilles heel of the model-free DRL approaches OP is criticizing: the NNs can easily learn to optimize their actions, even tiny NNs are more than enough, but they just don't get fed the 'right' data ie. exploration is bad). Relevant papers: https://www.reddit.com/r/reinforcementlearning/search?q=flair%3AExp&sort=new&restrict_sr=on https://www.reddit.com/r/reinforcementlearning/search?q=flai... If you're being very narrow and considering a classification problem, well, that's a RL problem too: you can optimize which datapoints you get labels for based on how informative a datapoint is (most datapoints are simply redundant) or how expensive it is to label. That's called 'active learning': https://www.reddit.com/r/reinforcementlearning/search?q=flair%3AActive&sort=new&restrict_sr=on https://www.reddit.com/r/reinforcementlearning/search?q=flai... It's particularly natural if you are doing large-scale image classification and have a service like Amazon Turk plugged in to get (or correct) labels.