Yeah, I came to realize your point a few hours ago after giving it more thought.
It’s probably the solution that portrays the New Republic in the best light. They don’t have enough resources to go to the Outer Rim, so they secretly authorize a militia to keep a tragedy from happening out there.
That being said, it does seem like Filoni and Disney are really pushing for the angle that there are people in the New Republic who want to deny any escalation of Imperial power. Kinda like how the Ministry of Magic constantly denies that Voldemort has returned in Harry Potter. Many people would prefer to live in a comfortable delusion rather than accept a harsh reality. Granted, they may just be pushing this for Thrawn in particular. Perhaps after the Senators were proven wrong with Thrawn it makes more sense for them to take the threat of the FO more seriously.
TL;DR - I retract my previous comment as the second paragraph of the crawl effectively establishes the need for the Resistance.