I still disagree. You're making a false dichotomy that there can be either "rush of power" or "nothing". Instead, I feel a sense of achievement at a job well done. To say that that's "power" requires stretching some definitions.

You can take the position of "achievement isn't a feeling of power" if you'd really like to, in which case I simply say find and replace all prior uses of "feelings of power" with "feelings of achievement" and the argument still stands. I'm happy to use whatever definitions you want. Taking joy from your success in doing things (whether you refer to it as achievement or power) is simply not an valid ethical justification when it is at the expense of violating other peoples right to control of their possessions.