You're not wrong, but you are ignoring reality.

Reality: There is a global demand for fossil fuels.
Reality: That demand will be met.

Canada has a choice.  We can help fill that demand, or we can not help fill the demand.  If we stop producing oil, another country will pick up the slack.  If Canada stops producing fossil fuels, the same amount of gasoline will be burned.

If Canada decides not to produce fossil fuels, we're simply passing the opportunity to someone else.

The prosperity, and quality of life of Canadians is important.  Your argument completely ignores that side of the equation.