I have absolutely no idea what you intend by your reference to Aborigines, so I'll steer way clear of it.
As to what you're thinking, think no more: Aviation is not "necessary", but it depends on what you mean by "necessary". The economists talk about needs and wants. Needs are things which, if not satisfied, result in you dying. Wants are things that make your quality of life better after your needs are met.
I've attended a seminar that included representatives of the aviation regulator and the maritime regulator. The latter opened by saying: "Without the maritime industry, half the world would freeze and half the world would starve. Without the aviation industry, there would be no aviation industry."
That's why the disruption of shipping out of Ukraine is important. Michelle and Ferret's lost baggage; not so much, especially when they keep paying in advance for the 'service'.