I didn't say that having resources meant they should be abused. I said that if somebody can afford $150 for a RPi can afford $2.50/mo for power instead of $0.50/mo for power, and that as a result, factoring in lower power use is a poor reason for buying something you don't otherwise need, especially when that power is easily available.
If that power were coming from locally finite source such as solar or wind, or battery, it's a different story.
In theory, I could leave all the taps on 24/7, however that’s A) abuse of a free service, and B) a complete waste of resources.
Even cleaning the car I’m very strict about turning the hose off when I’m using the sponges.