While I do agree with you, they were locked out, not in.
They got lucky and one door unlocked briefly and opened, but the issue was a failing 12 volt battery.
I’m sure several keyless entry vehicles that don’t have backup keys would be stuck with the same problem in the event of a full battery failure.
So my car is well old enough to not have this problem and I thus have no reason to know it, but would that fix a failing battery that won’t take a charge? Even enough to get the doors unlocked, I guess?