Dayan tribe itself knows that the composition of the tribe on the lower south is so complicated and there is too much trouble for them to meddle in.
Of course, this was before Brolgadhr tribe unify the tribes on the lower south. And then when Aeryon rises, Garron made an alliance with the Brolgadhr tribe and even sent his daughter to marry the Kan
Garron had made all the right decision, choosing the right people while he hides behind them and develop his tribe.
Garron might not be a great warrior but he does have an eye for talent.
Because of that, when Garron was alive and expanding their power, Dayan eye different target and did not want to get involved with the Utgard tribe
Because if they get involved with the Utgard tribe, they could get involved with the Brolgadhr tribe.
If that involvement is something good, there is nothing to worry about.