So please tell me, what’s the possibility of such thing not repeating itself again? Unless they are going to be very careful this time, making sure that they avoid anything that would lead to such events happening again. Although I do know that this kind of events hardly occurs, because we hardly see news of big exchanges being hacked.
PancakeSwap is a non-custodial exchange or a "DEX" as they call it, hence there is no user "account" that can be sim-swapped as with custodial exchanges such as BlockFi; very similar to how the likes of the famous UniSwap/SushiSwap works.
But then again, the potential exploits or "hacks" in this case still exists, just a totally different attack vector as what you're thinking.