He's right that proprietary software can be used for malicious purposes or evil intent, but he's incorrect that it must be.
Perhaps it must be simply because if it can be misused, it inevitably will be. Therefore, Stallman is correct.
You're moving the goalposts now. You claimed that if proprietary software can be misused, it will be, and therefore therefore Stallman is right about all proprietary software being malicious - yet it's precisely those types of misuse you now want to deem irrelevant which underpin the entire moral argument behind the free software ethos.
The argument has never been that proprietary software is immoral merely because the code isn't free, but that the code not being free is what allows those other abuses to occur.
No, you just didn't understand the goalposts in the proper context. "Harm" and "misuse" in FOSS have never been about any type of harm in which software may take part, simply the types of harm that can be achieved by software and licensing.
In FOSS, harm means restricting a user's freedom and ability to control their information, privacy and the devices they own.
Take Stallman's own website[1]. It is mostly text. While this makes it fast, it doesn't make it readable at all. And finding specific stuff is nearly impossible. Yeah, there is a search feature, but is extremely rudimentary and very user-hostile.
If it were up to Stallman, the entire Internet would look and work like this. This was OK in 1990. It no longer is. Sorry.
that is the weirdest comment ever. On HN no less which is literally just text.
"doesn't make it readable" is not weird at all.
Also, Stallman is a grade A asshole. I've met him, and he is a deeply unpleasant man to be around.
WRT your second point, that is subjective and ad hominem. I live in Emacs and without GNU I was stuck with Windows. Without GNU none of the good things we have today would've existed, Linux wouldn't have existed, we were all programming in ASP.NET or C# or what not. So even if he is an asshole, he's a very, very, very important one.
When you want something to change you can't have only moderates as they're in fact happy with the status quo.
[1] "I generally do not connect to web sites from my own machine, aside from a few sites I have some special relationship with. I usually fetch web pages from other sites by sending mail to a program (see https://git.savannah.gnu.org/git/womb/hacks.git) that fetches them, much like wget, and then mails them back to me. Then I look at them using a web browser, unless it is easy to see the text in the HTML page directly. I usually try lynx first, then a graphical browser if the page needs it (using konqueror, which won't fetch from other sites in such a situation)." (https://stallman.org/stallman-computing.html)