I'm in favor of conservation and I don't believe that. I don't understand the point of your dichotomy when there exists many options between your two extremes.
One alternative is to realize that a reduction of one's energy footprint on the order of 20-40% can be made simply from awareness and intelligent choices requiring no compromise. I would argue that many of the easy big drivers of conservation improve quality of life and increase happiness. Beyond that change may be required. “Change” may be undesirable, reduce quality of life, or simply ill-informed perception.
A compelling driving force is the economic incentive, which is particularly attractive with a good scheme, e.g. pipe energy savings directly into non-taxable retirement accounts. Additional strategies enable insulation from future energy costs, or even directly hedging changes in future energy costs.
“Saving” becomes a fundamental exercise in efficiency, which should appeal to many types. It is a fundamental exercise in character, which should appeal to other types. It can be competitive, rewarding, challenging, and fun, which should appeal to even more types. It exercises the mind, satisfies curiosity, engages critical faculties, and requires learning and understanding about our connection and place in the world.
I’ve yet to hear a compelling argument against applied wisdom or trying one's best. But I’m always open to it.