[rbr]

It also generalizes FF by adding the motion. Even without FTP as a next goal, walking fetch helps make FF practical, it provides application.

Adding to that, it also solidifies FF and further conditions the response to the command. In other words FF isn't complete until walking fetch is done. IMO

 

[rbr]

Plus you would be skipping stick fetch by going on to FTP.

That's a step a lot of folks (including pros) skip these days.