There certainly are problem seals. Where Washington state is focused is at the dams and up in the rivers. While the sea lions there did not create the problems, they are benefiting from having dammed the rivers, and they're preventing salmon from getting up and spawning. Those are very targeted removals.
What's being proposed in British Columbia is not targeted removals of problem animals, but the removal of half of all the population. Doing so will have an immediate consequence on transiting killer whales—