Nemik contradicting Yoda doesn't make Yoda wrong, and it also helps appreciate Return of the Jedi

At first viewing, "remember this: try" seems like a direct response to "do or do not, there is no try." And if it was, that would be a pretty neat way for the new series to break with the old. But that's not what's going on here. The thing is both pieces of wisdom are entirely situational, and Andor is simply a show about different situations. One piece of advice is what you need to use the force to lift an Xwing out of a swamp, the other when you need to use ropes to rotate a tie fighter in the jungle. Let's go back to the original trilogy:

A common criticism I hear of RotJ is that it makes a big deal about Luke's nonviolence while all his friends are off doing action hero stuff. And I never really liked that criticism because it's clear that Return of the Jedi is two different plotlines intertwined. One is a heroic war story, the other is a journey of religious introspection. So when Andor introduces Nemik as the philosophical core of the rebellion, his philosophy is exactly opposite from Yoda's, and neither is invalid because they're aimed at different audiences.

Notice, for instance, that the climactic duel on the Death Star has no impact on the Death Star's ultimate destruction. Luke wasn't there as a saboteur. He was fulfilling his destiny and following his connection to The Force where it led. In that context "do or do not, there is no try" is exactly what he needed to hear. Conversely, "remember this: try" is great advice when you're setting up a log trap or flying the Millennium Falcon into the heart of the death star. There's overlap between rebels and jedi, but they're coming from two different places, and also going two different places. If Han had been on the Death Star, he would have shot Vader (first) and been right to do so, but that doesn't make Luke wrong. Similarly, Vader coming back as a good force ghost makes sense in the context of his religion, but wouldn't obligate any individual to forgive him for the people he killed in the star war. This doesn't make the Jedi a good or a bad religion, but it shows why they made such a mess of things back when they had significant political power.

Star Wars is a big universe and there's no one proper way to tell a story in it. Return of the Jedi contains two different stories in an era long before each one could be told in a separate Disney+ series, and if you understand that, it doesn't suffer for it. And Andor shines on its own because it doesn't lean on its IP to serve up something familiar, but it also doesn't apologize for being a Star Wars product. It just looks at something we all love from a certain point of view - one that any serious analysis of the series would have told us must exist prior to the release of Rogue One.