By then we have done so much damage we can do nothing to undo it. Some people seek to build their righteousness on criticism and judgment of those who violate their own standards. In order, we have annual, monthly and weekly religious celebrations in this verse. For one believes he may eat all things, but he who is weak eats only vegetables. To his own master he stands or falls.
Food is a non issue to the Christian life.
This is the operating principle in all disputes over food and drink. Passover, Pentecost and Tabernacles. The first and last days of these feasts were holy days. In those days they did no work. In the New Testament era we observe no feasts.