To clarify the issue, I propose the following thought-experiment, set out in terms that everybody familiar with.Imagine that the editor or agent is a woman standing on her own in a bar.They may be wrong, but they are also an experienced colleague in the same business as the editor who's reading your letter, while you're just a stranger, and the editor is more likely to trust their opinion than yours.It's like putting a bad school report in with a job application.Basically, trying too hard to be persuasive won't help; the simpler you keep it, the better.
In both cases, what you're trying to do is win over someone who doesn't know you and can be put off quickly if you stick your foot in your mouth, with nothing but your own charms to help you. You say: 'Dear Editor/To Whom It May Concern/Dear Sir.' Dating equivalent: 'Hey, babe.' If you're trying to seduce someone, addressing them generically is not a good start.Half the letters they get are asking them to make an exception of some sort, and after too many such requests, they start to look depressingly unexceptional.You say: 'I've chosen you to be my publishers.' Dating equivalent: 'Get your coat, love, you've pulled.' It's their decision, not yours.If they liked it that much, they'd probably want to buy it themselves in the first place; they'd certainly tell you so without prompting.Recommendations are unusual, because circumstances seldom require them.