There's also the fact that there isn't an algorithm trying to keep you doomscrolling by promoting commercial content.

Lemmy is so far left leaning because a large part of its existence is due to people being mad at capitalism

Thinking like this is why people get surprised when right leaning parties get voted for in elections

Not really. I mean that "because..." part.

Leftism is inherenty tied to technology, especially new. It's part of its lifestyle. EVERY new, massive social "site" (or online service) is expected to be left-leaning by default. It may later change its political viewpoint, but in its relative infancy it's left.

Rightism is more about actions taking place in real-world. As such, the technology isn't perceived as more than a tool, used for specific purpose only, rather than part of, or the foundation of a lifestyle.

...and of course there's a plethora of alternative political views, options and convictions that are a mix of either extremes of the spectrum - if you meet a person online, it shouldn't be surprisied to learn about "pro-life", but also "anti-Trump" and similarly puzzling approaches to various aspects of life.

tl;dr: it's not about bots. It's because Lemmy/Mastodon isn't popular enough to serve as a tool for right-wing politics.

Grandpa also doesn't understand federation

I dont think that is the case. Left leaning people are just much less accepting of authority, so there are more likely to move of of reddit. right leaning people also tend to be more conservative, so they are more likely to stay on there old platforms.

Among people in general who actually read comments, the left does have a distinct advantage.

I would say less "left leaning" and more anti-capitalist / anti fascist. More socialism less Nazis.

Lemmy is a decentralized protocol, not an American centralized political leaning social media.

Lemmy also isn't profit driven, so you don't get libertarian tech bros.

The political discourse seems toned down here, I am already happy with that.

For all we know the people that are on the right have gone to other platforms. That doesnt stop you jerks from saying im on the right even though im not. For some reason both sides have adopted a "with us or against us" mentality and everyone is a nazi.

i think its not just the bots but also that the right want their posts to be seen and want to "present" themself and their "opinions". And i think for that, lemmy is just not visible enough, yet.

Not by bots but by rage farming algorithms. Rage farming the right is easy and profitable. Facebook has gotten that down to science. The fake absolutist free speech espoused by Twitter's management as well as the apparent moderation inaction by Facebook are all about that. Letting right wing nuts rage freely generates engagement, generates ad revenue. The only thing the platforms actively manage is making sure that big name ads don't show up on Nazi posts.

I agree with the other commenters who say that the issue is primarily that the Lemmyverse is too small for the grifters to bother influencing, but I also think federation (and the non-profit nature) plays into this.

A site like Reddit generally does not ban members just for being Conservative and expressing relatively mainstream right-wing beliefs. They have to present at least a veneer of "free speech" except in the case of hate speech and violence. In addition, they don't want to drive away Conservative users, because that's where their money comes from.

To a small Lemmy instance, these motives don't come into play. More users actually costs the admins more money. And while they generally don't ban users willy-nilly, they feel they have a right to ban people just for being right-wing dicks.

Ultimately right-wing ideology cannot survive in a space like this except in explicitly right-leaning instances; which will be subject to the "Nazi Bar" effect until those instances are defederated from the rest of the Lemmyverse.