Targeted advertising is about determining and giving people exactly what they need. If successful, this increases consumption and grows the productivity of the economy. It's an extremely meaningful job as it allows for precise, effective distribution of resources.
The "stability in CPI" after the gold depeg in the 70s is also when wages stopped growing in real terms. Most "wealth creation" since that date is on paper.
most wealth creation being on paper is because labor stopped getting paid and capital saw all the growth
kinda like how despite all of the inflation the average person only saw a 3% increase in actual take homes while the hyperwealthy saw 300% (of much, much larger numbers).