They are blindly optimistic to say the season is over.
This is a line I am writing. I am trying to say
It is blindly optimistic of them to say the season is over.
Do the two sentences mean the same thing? I vaguely recall there is the structure "subject + be + adjective + to do something" that means the subject takes an action because they can be described as adjective. But I can't remember what the structure is called; nor am I able to find any explanation on the Internet.