In Deuteronomy 6:24 and 10:13, it states that to obey our Heavenly Father's instructions results in our good. A brief scan reveals many benefits including health. Examples include circumcision, allowing agricultural land to rest every 7th year, avoid eating items that contain poison such as shellfish and pork, adjusting the balance of yeast in our systems, and not to marry close relatives.
Examining the approximately 200 that are in effect for us today from a practical perspective reveals many such benefits. This type of discovery begs the question, "Why would our Heavenly Father want to do away with such healthy and beneficial instructions for this time period for Gentiles only and then bring them all back for the millennium for all human beings during the kingdom reign?" "Why is it wrong to observe them here and now?"