In making an assertion that ecosystems evolved to depend on regular burning, you're ignoring all the species which became extinct in prehistory due to regular burning.

That's how evolution works. That part of it is called natural selection.

Any suggestion that we should disregard the last 100 years of land management science, in favor if lighting up the nearest bush every other month, is just as absurd as it sounds.

That's not an accurate description of Indigenous fire science at all. I recommend learning the science before you try to critique it. But you are right that European primitives have only been studying the ecosystem for 100 years. They've been messing stuff up for 1/600 of the time Aboriginal scientists have been collecting measurements.