The cost of transferring the World Secret Domain was truly too great, so much so that Sonia and Diya were a bit reluctant. However, they had no qualms about Vishi and both suggested Ash take Vishi's Sky Garden.
They don't mind Vishi dragging themselves down, but they mind even less about Vishi's future collapsing.
The willingness to harbor a viper and extract its venom is not at all conflicting. Even if Ash doesn't need the World Secret Domain, they would still suggest taking away Vishi's Sky Garden—to cut off all of Vishi's aspirations and ensure her lifetime as a compliant maid, which benefits everyone.
Vishi was so anxious that she bit her lips until they bled, but remained silent, glaring fiercely at Ash like a kitten being deprived of food. Ash eventually vetoed this proposal, stating that his reason was he would not participate in combat, so having the World Secret Domain was of little impact.
