The "there are...that" crutch

Many new writers have a sentence pattern that they rely on far too often. It is a crutch that they don't really need. Here is the pattern with variations:
There are _________ that ________________.
There are _________ which _______________.
There are _________ who ________________.
It is _____________ that ________________.
Most often the three words such as There are/that can be eliminated and the sentence still makes sense. Suppose I wrote "There are people who never delete their old email messages." I could eliminate There are/who and I'm left with "People never delete their old email messages." This is close to the original meaning, but the original didn't mean all people. To really capture the original meaning, I could write "Some people never delete their old email messages." Here is another example: It is the Supreme Court that has the final say in major court cases. Instead, I could eliminate It is/that and end up with this: The Supreme Court has the final say in major court cases.