Huh? Caen was very heavily defended, as the hinge to Normandy. Criticise Monty for Operation Goodwood if you like, when he made a series of rapid offences against Caen and lost a lot of tanks (made some ground but not really worth it). But such military hindsight is 20/20.
He spent quite a bit of time sitting before Caen, sipping tea, doing nothing....despite what the timing of the plan required.
Heavily defended? No sh!t.