Very dramatically overstated. Always needs to change to often or even sometimes. If a wide board is desired, there is a point of diminishing return with regard to gluing the pieces back together and the milling required after this point. There are a host of other factors that might lead one to mill in this fashion. Enough so that it is not a simple foregone conclusion.
Rocks will probably be thrown but, I would mark the outline of the board on top of each leg and then drill a couple of pilot holes thru the top of each leg to locate the desired location from the bottom. Then drill countersink holes from the bottom and use screws to secure them, followed by plugs to cover the holes.