Why are target date fund bad for a brokerage account? What to do with $60K in a new brokerage account?

I want something like "set it and forget it" but seems like target date fund are bad due to something to do with capital gains which I didn't understand when I read it somewhere here. Can someone please explain?

Also, if someone can please 🙏🏼 tell me exactly what should I do with $60,000 if I want to open a brokerage account with Fidelity? I am so confused. I was about to open this new account and put 100% in a target date fund 2060 but then suddenly (fortunately I guess) I came across this post talking about how target date fund are bad for a brokerage account.

Thank you.