“Warren's wife, Jeanie, made sacrifices, too. She gave up her full-time job to focus on their children and household, allowing Warren to focus on the business”.
The author makes this sound so unusual. Many parents that do not own a business make the same sacrifice. 
“He didn't spend enough time with his children when they were younger, because the business demanded his attention”
Workers often have to work extended hours without warning and little choice to say no. They also have travel and are away from home. They also make similar sacrifices
“Further, he put all his assets at risk over the years by making personal guarantees to borrow the funds necessary to grow the business.”
Workers often wonder if the next reorganization would eliminate their jobs and pension. 
One thing is clear. This author has little understanding what the average Canadian goes through to live and raise a family.  
I see no reason that they should have special tax treatment.