Think they are talking about the external filter .
My guess is no one is going to remove the fuel pump , unless they have to . Certainly not to remove the strainer .
The 2 older cars I have replaced the in-tank fuel pump , I had to drop the tank !
From the photo , it looks like that assembly also includes the fuel level sending unit , also . Which explains part of the cost .
Other than that , who knows why the companies do what they do ?
God bless
Wyr