I think it is the phrase "Kicking it straight" that some object to; nothing needs to be actually kicked.
However, yawing your aircraft to align with the runway as you flare is entirely sensible and desirable. as fredthedog says, it only takes a gentle movement of the rudder pedals to achieve this, coupled with slight into-wind wing down to counter any secondary roll.
Regarding SIMs, well OK they cannot reproduce all the forces one would experience, but they could still be used to practise the coordination of the crab-to-flare-to-yaw-straight manoeuvre.