Yes it's important to point out that the population angle is only pushed because it's working. Solving that with robots or positive birth rate won't remove the subversion. They'll shift to a new tactic. "We need immigrants to do the jobs that Japanese won't." "Without foreign workers we'll have $10 a head lettuce." "We must do our part to help the refugees." "Delicious kebabs on every street corner!" "We have no culture." "Japan has always been a nation of immigrants."
Next they'll start telling each other that an all-Japanese society is "so boring" and how "lazy and entitled" Japanese workers are ....
Yes it's important to point out that the population angle is only pushed because it's working. Solving that with robots or positive birth rate won't remove the subversion. They'll shift to a new tactic. "We need immigrants to do the jobs that Japanese won't." "Without foreign workers we'll have $10 a head lettuce." "We must do our part to help the refugees." "Delicious kebabs on every street corner!" "We have no culture." "Japan has always been a nation of immigrants."
Japan already has a fair amount of delicious kebab shops in my experience. Run by immigrants as it is though so already lost that one...