Ding Ding Ding! This right here. Unfortunately, they say one thing one day, and the opposite the other, and know their followers will latch onto the answer they want to believe/be true. It is exactly how religions work too.

Jackhammer the floor out. Lay down weeping tile that drains into a receiving basin with a sump pump. Rent a backhoe to dig around the exterior of the foundation, and seal the trouble area with rubberized sealer.

There are finer points for each process, but that’s the gist of it.