No, we'll just consume more.

We're doing a lot of bullshit. Research shows we could maintain our effective lifestyle while cutting consumption by up to 60%

No, because 10% of richest people on Earth (majorly Western Bloc, including Europe) are responsible for 50-66% of global emissions.

For example:

Ethiopian is responsible for 0.14 tonnes of CO2 emissions yearly on average.

A Swede on average is responsible for 3.43 tonnes of emissions.

An American is responsible for 13.83 tonnes.

https://en.wikipedia.org/wiki/List_of_countries_by_carbon_dioxide_emissions_per_capita

The issue isn't overpopulation, not at all, but that we have a bunch of countries with hyperconsumerist economy, a car in every household, high electricity usage, accessible red meat, air-conditioning etc.