Just like we see a person in an LLM, it's easy to assume that because we create things with a purpose, that the world around us also has to be that way. But it's just as wrong and arguably far more dangerous.
Appeal to majority much?
The "we the theists (or I guess non-nihilists?) all agree that..." falls apart once you start finishing the thought because they don't agree on much outside of negative partisanship towards certain outgroups before splintering back into fighting about dogma. Buddhists and Baptists both think life has meaning, and that's a statement with low utility.