Big banks do this to the juniors: pay them tons of money and work them to death. They have no problem finding talent. But I prefer companies find ways to make their employees lives not miserable instead of saying "here's some money for your misery, you may want to spend some of it on a good psychologist".
I am saying this as someone who has seen what working in oilsands does to people. Some people enjoy it, but some only stay for the money. They are extremely well-paid, extremely miserable, and never quit.
However I suspect we aren't talking about FAANG/unicorn-capable top talent here, hence the candidate applied to this job in the first place. I'd also be suspicious the candidate is ducking questions because they can't answer them. Unless it's just interview practice for them and a waste of time for the company anyway.