Well it is fairly difficult to point you in the right direction with just one photo and no spec sheet, but I will give it my best shot.

If the builder stated a level 5 finish on the ceiling then the tape joints would be an issue worth working on.
If they spec’d a knockdown finish which it looks like on the photo it is then the tape marks are visible mainly because of the way the light comes into that space and the style of finish.

If you have any other pictures or specs I would be glad to help.

You can find the breakdown of the levels of finishes here. http://constructiondesignworks.net/levels-of-drywall-finishes/

If you use flat paint it's likely you won't see the imperfections of the ceiling.

Thanks! I'll meet w/contractor tomorrow and find out "what level!" So much to learn! I KNOW I'd never go through new building again. Lost our home in 2017 wild fire...posting a couple of new

pictures. May be able to see the problems m more clearly.