I have worked at two FAANGs. It's obvious to me that there is no vision, just raw execution on strictly defined design documents. The product decisions come from a place that is commonly never even exposed to the engineer.

"Meta is product-driven not engineering-driven."

My point exactly. Divorcing product management from technical implementation is a fools errand in an extremely technical company.

When every engineer is focussed on execution, it adds up. Interesting engineering led ideas cannot lead the company in new directions.