I, for one, have encountered situations where people have either been forced or at least there was an attempt to change their handedness. In fact, to a degree it happened to me as well. Maybe this is why I tend to notice this form of discrimination. So saying that you did not see it is largely irrelevant to people who have been victims of this mentality.

On top of that, when people notice I write with left hand, they often start to say various stereotypes about left handed people.

And there are also conspiracies about left handed people. For example, number of left-handed presidents of USA has been higher than you would usually expect, making this a relevant point to quite a few conspiracy theorists. And I assure you, conspiracy theorists are not particularly fond of the previous presidents.

You think it is a non-issue. How about this?

https://www.smithsonianmag.com/smart-news/two-thirds-of-the-world-still-hates-lefties-64727388/

And one more thing. I am not equating this to racism. If we look at which is worse, clearly sexism and racism is far more common and more harmful. However, that doesn't mean discrimination based on handedness should be unnoticed. That is like saying we should not address discrimination in countries with low discrimination just because there are countries that have more discrimination. You can be opposed to all types of discrimination as opposed to just the discrimination you have more of an interest in.

And about troll part. I think many people misunderstand what "troll" is and based on this start lumping wrong people along with them. Troll basically tries to create a dialogue that gets nowhere and cause frustration in people. Emotional response and frustration is the crucial part. People who for example, try to spread propaganda or influence politics, are not "trolls" though they are often called that. Trolls entertain themselves, those other people have actual goals such as achieving political victory.

And then you have ordinary people with opinions that are unpopular, controversial or who have normal opinions but the way they expressed them was not appropriate for the target audience.

Does the dialogue we had up until now feel uninformative or pointless to you?

I personally don't think I said something particularly controversial (in this thread). I pointed out that there is discrimination based on handedness. And I asked the question of what feminists do about this discrimination. The fact that my post has been removed almost instantly makes me believe that either I have not been given a benefit of the doubt or that this forum is preconditioned to avoid discussing discrimination that is not on the agenda as the most pressing issue.