Well, one tank for 3-5 ATGM crew's might be a good exchange to
me considering that ATGM crews are suppose to get a good first hit
kill chance on a tank.
You might have 10 ATGM crew, but there will surely be more than
2 tanks and even more other armour to carry on. I always
suspected Israelis to make their armour so "tanky" because they
want to not only keep the crew alive and combat ready but also
force their enemies to expend as many of their AT weapons on each
vehicle as possible.
Unlike most computer games, ammo IS limited on the
battlefield.
That said, nothing is invincible to attacks. No tank is
invincible it's just a matter of how long it takes to kill one
before it kills you.