My blog gets a lot of comments - and too many non spam comments go into the Spam queue, forcing me to moderate before they can be published. This is an unfair waste of my time. I would like to turn the filters off, for my blog.
Unfortunately for these owners, Blogger has stated that the comment filters are designed so everybody must participate. If the new filters were made optional, spammers could publish blogs with spam comments, and minimise the filter effectiveness.
If your blog gets a lot of comments, we're happy for you. However, if the comments must be moderated before they can be published, and doing this requires an unfair amount of your time, you're going to have to make the sacrifice. If the comments in question are consistent enough, your moderation activity will help train the filters - and eventually, you'll have less comments going into the Spam queue.
Filtering and moderation, by everybody, will train the filters. In the long run, this is good for everybody, except for the spammers.