Otherwise i agree. Having just spent a week on-site at a client, you just notice a lot more problems (or start to understand the details of previously identified problems) that are in your capacity to fix.
I agree with everything you said, but this movement has been going on for a long time but and has been very bad at... hisss.. marketing.
These are complex topics and people don't want to put in the effort to understand them so this needs some top-shelf selling power. And there's no money to be made. Just freedom (as in speech).
Worked at a startup that unfortunately went under, trying to reuse heat generated in datacenters. (saves on electricity spend on airco and saves on having to generate heat elsewhere)