I will try to explain it differently
When you raise and lower your saddle the tube in the frame the seat post goes into is called the seat tube.
Free wheel on your bike and put either pedal down so the crank arm is pointing down in line with the seat tube. It will not be straight down but slightly diagonal as the seat tube is also at an angle. This is the furthest distance from the saddle to the pedal.
Then keeping your feet flat on the pedals try to lift yourself off the saddle upwards in the same direction the seat post points upwards, this will be diagonally backwards. If you cannot lift yourself a little your saddle is too high. Just keep repeating lowering the saddle until you can lift a little and it is better to be a bit low than a bit high. It will likely feel very different to how it is now.
People’s bodies vary a lot in their makeup, strength and flexibility which is why bike fit rules / methods have to be interpreted to suit the individual and taken literally are often incorrect.
Hope that helps, if not just keep dropping the saddle until you stop rocking on the saddle and no longer point your feet down to reach the pedals at the bottom.