Herein lies the problem. God commanded the Israelites to work six days each week. He thus intended for them to spend six-sevenths of their time subduing the earth and making a contribution to the development of society. If we have more time away from our occupational work, we are not free to spend that time in just any way we please. We still have the obligation to work, that is, to do something constructive and useful for mankind.
Many activities can contribute to the welfare of society in general.
For instance, one can do volunteer church work or hospital work. Some rest and relaxation, of course, are essential for a healthy mind and body. But we must be very careful not to let our increasing leisure time be dominated by self-centered recreation. God is the Lord of leisure time too.