The viability of the plan "they develop it on their own" depends on the time scales of the quest allowing it.It explicitly doesn't offer magitech though, we need to do that ourselves.
I'm not denying it'll be useful, but it feels like a bad buy to me when we can have a planet of people do the research to get ahead or own way but can't expand our hell once it's up.
There are some things, like playing with the outside, where we just need lots of people and a small number of super weapons don't help as much.
Also, not all magitech is made equal. What I mean by saying magitech is "if the high tech society has magic being practiced openly and magic is wide spread, then the technology involved has to somehow take magic into account". Basically, you can't have neural implants in a society where you regularly encounter wizards.