FWIW as a humanities nerd, “tractable beachhead” packs a lot of nuanced meaning into two words. It’s probably not the right vocabulary choice for most audiences, but it isn’t empty or arbitrary.
Tractable = you can make it work, but it’s not going to take care of itself, you have to get your hands around it
Beachhead = you’re on a mission, you’re trying to probe to find the right way in to get started to eventually accomplish the whole thing, but first you have to find a little spot to get situated and then expand from there.