I have two reactions to that statement:
1) While it's true that Czechs didn't suffer the hunger of the Netherlands or the physical destruction of Poland, there were certainly hardships. Jews were largely exterminated from the Czech lands, and if you read up on the liquidation of Lidice, you'll find plenty of brutality. My parents agree that they were seldom hungry during the war, but variety and healthful meals were another matter altogether. Children who got sick took much longer to get well because of the lack of vitamins and fat in their diets. My parents both lost a lot of teeth very young due to poor nutrition and limited dental care. Growing up, I always thought it normal for mothers to have partial plates rather than a full set of teeth. You can only do so much with potatoes. On the whole though, they were grateful it wasn't worse.
2)The Czech people have had a long cultural history of being over-run and dominated by other, more aggressive cultures. They are situated at the heart of Europe, and are more inclined toward literature, music, theater, and fine manufacturing than they are toward war. The way the Czechs have traditionally survived these difficulties is by knowing when resistance is futile. They are very good at enjoying their beer, enjoying family, and skewering the "overlords" with sly humor while they wait out the storm. Sometimes it frustrates me because to my American sensibilities it seems very passive, however, the country has survived a great deal, has its monuments largely intact, and the culture seems to pick up and rebound quickly after adversity.