What I'm saying is that there are steps you can take to live more efficiently that will enable you to live the same lifestyle much longer than doing nothing will. And, it will allow you to be more independent from big corporations, foreign oil, the government, or whatever other entity you don't like too. There's usually a financial benefit as well.
There's going to be lifestyle change no matter what. We can try to reduce consumption and live more efficiently,
or we can continue doing what we're doing and be forced to change when we can't grow the foods that we like, or we have to move because of drought, flooding, frequent wildfires, etc. If the coasts of the US flood or have wildfires all the time, where do you think those people are going to go? They're moving to your neighborhood, which is going to require some lifestyle change from you. Change is constant. Either path is going to require lifestyle change, but one path at least has the potential for better outcomes.
Actually, historically birth rates drop as nations become wealthier. The vast majority of the population boom that has occurred globally has come in poorer nations of Asia:
In the next year or so, humanity is expected to pass the 8 billion person milestone. These charts and maps put global population growth into context.
www.visualcapitalist.com