Of course there's such a thing as carrying capacity. It's unlikely that the earth can support 800 billion humans, especially if they all have dogs.
But we're not there yet. Taking the US as an example (because collecting and normalizing global statistics is hard):
- At any given moment, about 650,000 people are homeless in the USAt any given moment, about 650,000 people are homeless in the US
Per the US Department of Housing and Urban Development:
On a single night in 2023, roughly 653,100 people – or about 20 of every 10,000 people in the United States – were experiencing homelessn... despite the fact that There are more than 16 million vacant homes in the USThere are more than 16 million vacant homes in the US
Per the US Census Bureau, via analysis by LendingTree, as reported by the National Association of Realtors.
- In the US, about 14 million households experience food insecurity each yearIn the US, about 14 million households experience food insecurity each year
Per the US Department of Health and Human Services:
Food insecurity is defined as a household-level economic and social condition of limited or uncertain access to adequate food. In 2020, 13.8 ... despite the fact that The US wastes about 100 million tons of food each yearThe US wastes about 100 million tons of food each year
Per the EPA:
In 2019, 66 million tons of wasted food was generated in the food retail, food service, and residential sectors, and most of this waste (about 60%) was sent to landfills. An additi...
In other words, those who go without food and shelter do so despite the fact that we have at least an order of magnitude more food and shelter than they require.