Ignoring the bad jokes, it did not seem right that Ford would only use a sock on the fuel pump to protect the fuel injectors. Socks were used on cars before fuel injection just to keep large junk from plugging up the fuel lines. Even vehicles with carburetors had fuel filters. I found this was discussed earlier in this forum. There's a real filter, not just a "sock". At some point the manufacturers combined the fuel pump and fuel level sensor into one piece so they could make them cheaper. It appears that now they have added the fuel filter to that combination so they could eliminate the labor and parts to install the fuel filter separately. Of course, now you have to replace a more expensive part if any one fails, but they get to sell them.
I just looked in the Workshop Manual for my 2010 E450. It says the fuel pump assembly includes an "inlet filter" and a "lifetime fuel filter", in addition to the fuel level sensor. So it still has a "sock" that keeps junk out of the fuel pump.
Here's the earlier thread:
Where is the fuel filter?
PS My understanding of any "lifetime warranty" is that it is not as long as you live, or the life of the product, it's the life of the component. In other words, it will last as long as it lasts, at which time it has reached the end of its lifetime, and is then out of warranty.
..... Guaranteed to not break. If it does break, you own both pieces.