Look at the parable of the wheat and the tares. Until the harvest, it is nearly impossible to tell the two apart.
If we don’t individually know of our own salvation, then we’re to be pitied.
That’s not the proper interpretation.
They don’t take the tares out because they can’t tell weeds from the wheat.
They don’t take the tares out because if they pull them out of the ground they’re going to pull the wheat out too. And it’s not done growing yet.
That’s why they wait until the end. They can clearly see the wheat and the weeds and know which is which.