This probably isn't helpful, but I usually just ignore phases since they don't seem to have a huge effect on the kid (except the bear one). Parents can talk to them about it too.
I'm only on gen 4 in my generations save and they're so rich just because every generation worked. Currently, my sims is a social media influencer, so I'm thinking that there might have to be some drama so her kid isn't a millionaire forever. I guess it just depends on your play style though.