If your three statements ("As a result, the judge may not even read it. Second, the judge can't do much with an angry letter anyway. At best it just gets tossed in the trash.") don't mean "the judge will likely toss the letter in the trash," then I'd like you take the time to explain how the average person will 'see it differently' than I stated.
Communication skills are extremely important in my line of work. I could personally lose thousands if I misinformed or was unclear to a client.You sometimes see something that's not there. Lawyers use language precisely; that's important when writing and oral argument are such a big part of what we do. There is nothing underhanded about that. That you aren't up to that kind of precise use doesn't make it evil. It's just a skill that lawyers spend time developing because we have to for our work. That's not important to the contracting work you do so you haven't had the need to develop those skills. But that's no reason to slam lawyers for it. It'd be like me slamming you for being much better at using construction tools than I am. You've had the time over the years to hone your skills doing that because it's important to the work you do. I've not spent the time developing those skills. That's not something I need for my work, and I've not had much need for those skills around my house either. I don't resent you for having skills that I lack. Indeed, I admire skilled craftspersons. Yet you seem to resent lawyers for having skills that you lack. I find that odd, but you're entitled to your opinion.
Unlike your skills, my construction skills cannot be used for evil or to get over on a naive people. It would be my oral skills that would be used to get over on someone.
Also, if you don't think your oral skills cannot be used for evil purposed, what do you think your brethren, lawyer politicians are using their skills for? I'll tell you, the exact same thing the trial lawyers are using their skills for. To persuade the naive.
You have a tendency to do what most lawyers and politicians do...that is, to never concede.

