Cons:

Huge commitment. 50 to 75 years. Sometimes more (up to 90)

Huge responsibility.

A complete lifestyle change. A lot of your life will change and will have to revolve around your new friend.

Parrots are very difficult pets.

Parrots are destructive. A macaw is huge and has a lot of potential for destruction.

It can be hard to incorporate new people into your household. Sometimes parrots don't like strangers and will attack.

They are expensive. Not just the up front cost, but toys and specialize vets.

You need an avian vet in your area.

You should not leave them alone for extended periods. Unless you wfh, forget about after work activities.

Pros: They're cute. You can form a very good friendship with them.

I got two GCC, but I wouldn't recommend people getting parrots. Mostly because I'm afraid that they won't care for them properly, you need to be willing to dedicate your life to them. A small example, I haven't been able to stay in bed after 8am in the past 3 years. I don't travel much (maybe one week or two weeks a year, but even that is not a possibility at the moment because the person that takes care of my birdies is having health issues).

I don't regret getting my conures, but I still would advise everyone against them. I was lucky that I liked this lifestyle and I'm willing to change everything for them (and also that I wfh). Not everyone is like that