you've got an army and you are supposed to take a city with it.
what are you going to do with your army - move it into the city or spread it out chasing civilians in the mountains?
so the fact that anywhere a person could go, a person could also go, doesn't mean fleeing a city that is about to be invaded is futile or unreasonable.
Well, that is certainly not what Jesus meant by:
Luke 21:19By your patient endurance, you will gain
your souls. 20
But when you see Jerusalem surrounded by armies, you will know that her desolation is near.21Then let those who are in Judea flee to the mountains, let those in the city get out, and let those in the country stay out of the city.
It was not about forecasting wars and how to escape those wars, it was about salvation.
Anyone could have escaped a charging army including the Pharisees, but this was about believers and more of a spiritual fulfillment of what was prophesied through Israel:
Jer 24:
5“This is what the LORD, the God of Israel, says: ‘
Like these good figs, so I regard as good the
exiles from Judah, whom I have sent away from this place to the land of the Chaldeans.
c 6I will keep My eyes on them for good and will return them to this land. I will build them up and not tear them down; I will plant them and not uproot them.
7I will give them a heart to know Me, that I am the LORD. They will be My people, and I will be their God, for they will return to Me with all their heart.
8But like the bad figs, so bad they cannot be eaten, says the LORD, so will I deal with Zedekiah king of Judah, his officials, and the
remnant of Jerusalem—those remaining in this land and those living in the land of Egypt.
9I will make them a horror and an offense to all the kingdoms of the earth, a disgrace and an object of scorn, ridicule, and cursing wherever I have banished them.
10And I will send the sword, famine, and plague against them, until they have perished from the land I gave to them and their fathers.’”