When I look at "code" I see a lot of expressions with only literal text in it.

This is mostly done because there is no text widget on the menu left so people drag and drop the expression widget. Also the text was a literal text with dynamic data in it but the dynamic part has been removed.

Expressions must be evaluated so the consume time which is not necessary.

There is a "Convert to expression" method on a literal but there is no "Convert to text" on an expression.

When you can not type directly on the screen you must search for a literal and use copy past to get the literal and change it afterwards.