But MY POINT is that GDP, as a stat, is useful in many contexts and isn't just a propaganda piece just because it's what capitalists focus on. It's also been much easier to gather accurately compared to other stats.

We live in the 21st century. We have no reason to solely rely on GDP for developed nations because we have the ability to accurately gather the data for many different metrics. This doesn't mean we throw the baby out with the bathwater and never touch GDP