"I think to be oversensitive about cliches is like being oversensitive about table manners"

In this quote, Evelyn Waugh is recommending that being excessively worried about cliches is similar to being overly concerned with table manners. Just as somebody who is extremely delicate about table good manners might lose out on taking pleasure in a meal, somebody who is overly delicate about cliches might lose out on valuing the significance behind them. Waugh is suggesting that cliches, like table manners, are just social conventions that ought to not be taken too seriously. By being too sensitive about cliches, one may discover as pretentious or uptight. Waugh is encouraging readers to not take cliches too seriously and to instead focus on the much deeper meaning behind them.