A hypothesis on plate boundaries and Earthquakes

 A hypothesis on plate tectonics

Look at my this statement...

Yes,there are plates on Earth and they are moving. However, the fact of the matter is
the Earthquakes are not due to these plates ,but the plates and plate boundaries are due to Earthquakes..

Look at my above, may be stupid ,may be bold statement.,you decide.
  However before deciding answer few of the following questions
1) As the Earthcrust started to solidify, how the first plate broke and plate boundry developed?
Wait ,I will give your answer..The heat currents of magma from below comming up broke it.correct?
Now answer this question..
If there were heat currents /convection currents, (like boiling water comming up),at that location ,it would not allow the plate to solidify over it,in first place.

Now look at this explanation..
As the Earth cooled plates started to solidify over it.The tidal pull broke the thin crusts,as major Earthquakes, at several locations.Hence plates and plate boundaries are formed.
2) Why there are quakes at locations other than plate boundaries?
Wait ,I will answer it for you.
Those are due to intra plate fault lines.
Now another question..
If there is a small faultline inside a big plate,how come there are relative motion on fault line? Because there can not be a relative motion ,inside a big plate,which is must for a quake to occur.