According to the SMH:

Australia’s cattle farmers are at a ‘tipping point’, poised to seize a once-in-a-generation opportunity to reshape the industry to be more sustainable and high value after the toughest drought on record.

Source: Sydney Morning Herald

Is this a valid use of the term?

According to Merriam-Webster:

Today, ‘tipping point’ is most often used to mean “a critical juncture at which unstoppable change takes place”.

But when tipping point was first used, it was in reference to the propensity of white families to move out of an area when a certain percentage of the neighborhood became of black families. It served as a precursor to ‘white flight‘.

For example:

Then, at this “tipping point,” which varies considerably in different situations, the remaining Whites tend to abandon the area quickly.
—Spencer L. Kimball, Michigan Law Review, May 1960

Source: Merriam-Webster‘

Cambridge defines tipping point as:
‘the time at which a change or an effect cannot be stopped’

But their example is fake: