"Economics is a profession more akin to astrology than astronomy." Do you agree?

Not at all, it is about making predictions based on all the available data.

If I book a holiday in Spain in July and it rains the whole time, it doesn't mean I didn't make a rational choice based on the available data. It means that ultimately some things cannot be known with certainty.

The only issue is when people talk about economic forecasts like they're guarantees.

That's on the premise economists aren't influenced by other factors when making these decisions / thoughts.

I'm pretty sure weather forecasting isn't very comparable to economics.

Modern economics attempts to fit human free will into equations. Econometrics can only be descriptive and not prescriptive.