Climate change deniers don't consume CBC media. So they don't need to spoon feed the cause to their audience at every turn.
CBC has a huge fear of being controversial, which given extremes that pass for normal these days, and it results in the softening of anything that migh stir the hornet's nest.
I get the criticism, but it also over assumes the CBC's influence. We all have "the context [we] need to understand the crisis", some choose ignorance. The CBC can't fix that.