I'll give a software example because I'm just better at it, but if you describe Trello and tell me to decompose it on a white board I start thinking in terms of queues and write|edit|save tuples. I don't have to invent queues in my head and I have to wonder if it is possible to proactively assign a series of tranforms or schedules on an fresh input.

I know how to do it and it's all internalized. Even if I've never needed to do it.

that's the toolbox I'm trying to develop in ML. For example. I've studies LSTM and implemented one. What I didn't know was if gating was turing complete and essentially unbound. I didn't know if gates could be arbitrarily complex. Importantly I had no idea how to translate "I need a switch here" to a gate, or if a switch was even possible given the need to be differentiable for backprop.