Take the first example, the image of a wedding reception. Jesus doesn't disparage the beliefs of those who fast. In fact, Jesus even acknowledges the appropriateness of fasting. And in so saying, Jesus quietly, yet radically, challenges the time-honored customs of his day. The next two images are a bit more difficult to understand, since they aren't exactly indigenous to contemporary life.
Few folks are familiar with the process of winemaking in the ancient world.
Few of us have ever seen, or held, an old leather wineskin. Even Jesus' analogy of patching an old cloak with a new piece of cloth is unfamiliar in today's world. And you don't put your wine in cracked bottles. The examples may be strange to us, but the meaning shines through. There is nothing inherently wrong with social mores - nothing, that is, unless they paralyze us with guilt and thus prevent us from moving beyond a present destructive reality.