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I am sure this is exact reason why (I don't know how many) professional photographers prefered to buy "L" and shoot weddings, news, sports, wild life, etc. They all need to read this page ...
What fast 35mm alternatives they have?
The EF 35mm/2.0 is one f-stop slower.
Do you know a EF "L" lens that has more problems / defects (the 50mm L lenses are a bit problematic too - but I am not sure about how much is Canon made, and how much from users with not performing good focus accuracy tests and such).
And most need AF, so the Zeiss ZE 35mm/1.4 is no option for them.
And still, the Canon 35mm f/1.4L was long time the best fast 35mm AF lens. Now probably the Sigma is better.