There's no such thing as a perfect platform and I want you to know that even those huge platforms also make mistakes.
I really don't understand is that, the security is the most important thing in a social media platform and still they don't value it very much.
But I know that in this circumstances, they learned a lot from this because this scams will costs a lot of money. Even those high profiles can also be scammed, criminals are really wise in using other people's identity to easily believe on what they are offering in a certain tweets. They don't need to shutdown their platform because their platform can make us updated on what is happening in our surroundings. They should just fix their problems immediately before this scammers can victimized more people.