Most engine failure causes can be at least mitigated by effective preflight checks, and pilot behaviour. So, yes, good preflights, and pre takeoff techniques.
However, I have had one total failure, and two major power losses, whose causes were entirely mechanical (not poor maintenance) related. So, patting yourself on the back for an awesome preflight, and operating technique to the "position and hold" point, should not cause you to relax your guard for an EFATO,
Two causal factors I have had: Stuck exhaust valve just after liftoff. The engine does not stop, but you sure think it's going to, while you struggle to climb out at less than 75% power. And, a mouse nest of fibreglass insulation from under the instrument panel, being sucked up a hot air hose into the carburettor venturi. That one put me into the field off the end of my runway!