One brings a korban for one of two reasons: either because one wants to or because one has to. One may offer a korban as a way of saying thank you for the blessings of life. Instead of, or perhaps in addition to inviting some friends over to celebrate, one transforms the feast into a seudat mitzvah by celebrating in Jerusalem, publicly offering thanksgiving to G-d and sharing their bounty with others.
Jewish tradition teaches that we are to celebrate joyous occasions—Shabbat and Yom Tov, brit milah, a wedding—by drinking wine. Used appropriately, “Wine gladdens the heart of man” (Tehillim 104:15); used inappropriately, wine can literally kill.
The most basic rule of economics is that of supply and demand. The interaction between these two forces is the key—often the only—factor in determining the price of an object or service. In order to maximize economic efficiency, providing consumers with the goods they want at the lowest possible price, market forces must not be tampered with.
“One should be as careful with a light mitzvah as with heavy mitzvah” (Avot 2:1). Contrary to what is often taught, not all mitzvot are created equal. Some are more important, some less so. The mitzvah to accept upon oneself to observe the commandments (done through the recital of the shema) is clearly of greater importance than, say, ensuring we put salt on all our sacrifices.