Kind of. CBT is (oversimplification incoming) just every time there’s a negative thought, you make a habit of thinking a positive thought, so then your brain starts associating the connection. Basically retraining your brain to naturally go from negative to positive path, and over time your brain gets rewired to do it without consciously doing it.
It depends on what your metrics are for energy and resources. Are you talking about the end user hardware, or are you talking about developer time and effort. If it’s the former, you’re right, if it’s the latter you’re completely wrong. And while there’s merit to your point (if it is about end user storage, energy consumption, etc), that’s not really in short supply while open source developers free time is.