I think flat out refusing to work and provide for yourself is not a good answer to this problem. It is also abusing the society you live in, since you will expect fire fighters and doctors to show up for you in an emergency for example.
You don't have to always do something that you value. It is OK to have a job and just do that only to make the money you need. The fault is to make that job your only thing in live and ignore the other aspects that will make you happy.
What would be a good answer to this problem? Consider the problem of automation and the trends that only continue to promote potential disaster coming. Even if people
choose to work, the current climate is diminishing returns and a race to the bottom. It is actually incredibly reasonable for people wanting to check out of this arrangement, for it is filth. Survivability means nothing if the life you live is hollow and wasteful, especially for the primary hours of your day. Settling for less here has fed into this problem.
As for your second paragraph, I have very little to say about it other than just doing whatever for money becomes parasitic living. You end up disempowering your time in the hopes you will have time in the future to do what you value and find meaningful, and if we are to be mindful of the social situation of this very thread, people do not have the time for those things for they must be hamsters on a wheel until death. This is the second most critical mistake a person can make in their lives, and it overlaps with living for money. That's the wombo combo of suffering and misery. Living for money and living for the future is, simply put, the greatest failure at life one can act in.
As I say, the situation isn't really any better than he says it is - he focuses on the negatives sure, but I can't point out any logical flaws in his reasoning that might make him consider things from a different perspective.
He is one of what seems like a minority of young Japanese who reject the current system. He wants to work abroad, but doesn't think he can face the amount of underpaid, stressful work that would be required to amass the funds necessary to leave.
Over the last few days I have seen the latest batch of new workers, happy and full of hope that they can achieve their dreams and change the world. My gf dryly remarks that they will soon face a reality check and we won't see such scenes again for another year.
Unfortunately, human beings are not very good at empowering humanism when they reject social norms. He might as well be waiting for society to collapse there, for that may be his only hope going forward.
It speaks volumes to how bad humankind has ruined this world socially, but it needs to be absorbed fully. Anything sugar coating it doesn't address the core problems here, which is that thought and ideas which innately promote conflict. Japan has it particularly bad because of far more bullshitty social images of status through labor, but it's still mumbo jumbo nonsense.