I think the outcome that we're trying to achieve is good fisheries management, not to have a prescribed level of MPAs. If MPAs contribute to good fisheries management and are appropriate, clearly you can apply them. If they're not useful for maintaining the habitat or the stocks, use another method. That analysis is lacking.
I will use an example for you. Northern abalone are rare and are listed under SARA. The SARA recovery plan says that habitat is not an issue for maintaining the species, but overharvesting is. The question is, would you implement MPAs to protect a species where the recovery plan says that habitat is not an issue? There needs to be a clear line of sight between the outcomes that you're trying to achieve and the application of a tool, whether it's an MPA or any other restriction.