Comic mostly just demonstrates they have no idea what astrologists do.
If you think astrologists just spend all their time staring into telescopes, then you are mistaken. It's largely doing a lot of math, running simulations, number crunching, reading papers, etc
A lot of people into math developed that interest due to an obsession with some other topic. Trying to grasp the fabric of the universe is a great motivator to getting people into physics.
I think I understand what you mean, it's super unfortunate people just care about some typo (?). This is why I don't come to Lemmy for serious discussions anymore.