I haven't seen any people on this board who are unconcerned about resources - that description looks like an attribution error.
I'm judging by actions rather than words.
In any case, the public discussion is not about
how much resources we have, but
the effects of their use.
It's a funny thing. A decade or so ago there was a strong movement of concern about peak oil. This kind of fizzled out after the GFC, good old "demand destruction" dropped prices, ie economies went into miserable recession. Anyway, I saw a strange thing... a lot of peak oilers were climate change denialists. But when I went over to the climate change discussion groups, many of them denied peak oil.
From this I came up with Problem Exclusion Principle. The Pauli exclusion principle is one in physics, that two electrons can't occupy the same space (or more precisely, have the same four quantum numbers, but anyway). There seems to be a Problem Exclusion Principle, that once a person has decided X is a problem, they then insist that other problems either don't exist at all, or are merely expressions of X.
For X, put in climate change, resource depletion, the patriarchy, debt-burdened money supply, or whatever. Obviously this is a psychological defence mechanism. If X is the root of all problems and we sort out X, then all our problems are solved and we ascend upon a sunbeam into heaven for eternal bliss. But if X is a problem and Y is a problem and Z is a problem and they're all independent - well, it gets a bit overwhelming and we're a bit lost.
And this is why I am keen on changes which are solutions to several problems. For example, take the guidelines:
1. don't fly
2. bring work and home closer
3. trips under 5km walk; under 15km, cycle; over 15km, public transport
these address fossil fuel depletion, climate change, personal financial problems, and physical and mental health. Even if one of these things doesn't seem like an issue to you, one of the others will, and they help with all. You can quibble with the details, of course, and this is indeed a good way to avoid the discomfort of action. But broadly-speaking at a city-wide level they are true and good solutions to these several problems.
Likewise eating seasonal and local food, eating less processed food, using less electricity, and so on.