Some people have tendency to condemn a bad value, bad thinking, bad act, etc. However, the sad news is they, themselves, might do it.
This boils down to the idea that : “I should think that way.” But not necessary : “I will do it.”
A very realistic example
If someone is not feeling well, what will you do? He seems need help. I would think I ’should’ help him. Perhaps ask him how he felt.
Above is what I should think.
That’s why I did.
I was in a train. One guy vomited, he looked sick. Instead of helping him, I alighted and boarded the next train.