Technocrats on this site are very fond of your argument, so fond that I stored the reply I saw years back when someone else said the same thing.
There is no monitoring dashboard for the planet. News articles like this are your warnings. There is no innovation to be had that fixes global aquifer levels.
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Original Mathusianism should be distinguished from neo-Malthusianism, in that the latter does at least have some evidential basis in that it is based on measurement of resource levels and their rate of use, not just some political philosopher's wooly notion of overpopulation.
The problem, as I see it, is that even if you are optimistic about the theoretical capacity of the planet to sustain human life, its practical capacity is limited by how efficiently we use the resources to hand, and the current system does not properly incentivise efficient use. More often, it's the complete opposite, because the price of resources like water and soil does not reflect their true scarcity.
It's like having a large store of firewood. Enough, in theory, to heat your home through several years of harsh winters. Then you burn the whole stockpile in a great bonfire on the first cold Autumn night. That night, by every metric, you'll be warmer and cosier than you ever have been before, but you'll still have doomed yourself.
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Reminds me of the well-known type of question in introductory calculus:
Q: "A population of bacteria in a petri-dish doubles every hour, after 24 hours the petri-dish reaches 100% saturation. At what time did the petri-dish reach 50% saturation?"
A: 23 hours.