Bottom line is sloppy joints are bad....
There shouldn't be a business card thickness between the mortise and the tenon....
What happens when things dry out... they shrink... Will that 16 of an inch be a 16th after drying?
No it will be much larger....
If you're building an outbuilding such as a garage, barn or shed that's one thing but if you're building a house that's another...
I don't want big gaps and sloppy joints in my house.....