Largely, I agree with you. Just pointing out the appearance of hypocrisy could lead to tension in this decisive time where we need to act now, as you say. A mixture of tariffs / investment could be used to get the goal most effectively.
Imposing the tariffs would result in the investment you're looking for anyway. Once you make coal uncompetitive on cost, people still need electricity, so they buy renewables. The investors follow the demand.