MCT is just that "Minimum." It simply represents a carrier's willingness to accept the risk of a misconnect.

It is not necessarily and often is not the SCT (Sensible Connect Time) for you. That is a judgment you must make.

Personally, this is a judgment I want to be able to make for myself. There are times when I have a tight schedule on both ends of a journey and I am willing to risk the misconnect. There are then times when I have the leisure to travel at a nicer pace and do so. But, I want to be the person making the decision.

This also becomes a reason not to check luggage. Perhaps you can save money, have an extra day somewhere or whatever if only you spend an extra 10 minutes packing efficiently. No reason a 7-10 day trip can't fit into carry-on.