I mean, this is only true if you know your target is a raging Trump supporter.
Obviously, that's a very cherry-picked example, but generally, length IS entropy, even if the characters are somewhat predictable when seen by a human, as long as you have no reason to predict the password based on the things the person likes.
To give another example, "Inmyyoungerandmorevulnerableyears" is going to be an insecure password despite its length if your entire personality revolves around how much you like The Great Gatsy.
On the other hand, something based on random words like "defaultsocksillegalinstalledconnections" is going to be VERY secure, despite how readable it is, because it's still gibberish and is long.
I mean, this is only true if you know your target is a raging Trump supporter.
Obviously, that's a very cherry-picked example, but generally, length IS entropy, even if the characters are somewhat predictable when seen by a human, as long as you have no reason to predict the password based on the things the person likes.
To give another example, "Inmyyoungerandmorevulnerableyears" is going to be an insecure password despite its length if your entire personality revolves around how much you like The Great Gatsy.
On the other hand, something based on random words like "defaultsocksillegalinstalledconnections" is going to be VERY secure, despite how readable it is, because it's still gibberish and is long.