Earlier quoted context omitted.
It doesn't seem to reduce the supply of labor in Canada, since the author of the article is self-taught. However it's likely to increase the overall level of training, which is good for someone who needs their broken trim board replaced.
No it’s not good. The lower the barrier to every the better. More ability to choose the level of quality work you desire. A handyman for bill gates is going to be a complete different class than one for the roach motel but it’s still good if the roach motel can get one.
Now when it comes to stuff like building a kitchen, you could go with proper carpenters or furniture folks or a handyman. It’s good to have those different categories and know what you would be getting.