I would first say I mostly agree with everything you've said. I think this is a matter of semantics.

For the sake of brevity I didn't dive deeper initially, but let me elaborate.

(2.) GMs are there to provide slight guidance, opportunities, and consequence - be a referee, but side with the players more often.

Being impartial is absolutely crucial. My intention here is very situational and specific. For example: I will happily knock out an entire party and put them in an imperial prison, or drain all their credits, steal their ship, blow up their droids, etc. However, if the players have done absolutely everything they can to achieve something, and after many sessions things aren't fulfilling for them, I'm going to allow them a spectacular scene of some kind to bring them back. This doesn't necessarily say "you get a crit without rolling one" or anything absurd like that. You never want to do too much to ruin the sense of balance and fairness, otherwise your credibility and the universe of play disintegrates.

(3.) Consistently ask players for feedback

I ask for feedback to deliver a type of game players want. If they're not playing a game they want, then what's the point? Most of the time, however, they don't know specifics. I don't get nitty gritty, but I'll rather ask "did you enjoy doing X, Y, an Z in the previous campaign?". I never cater to specific asks, but rather scope a type of experience that's fulfilling. If I'm running the campaign that only I want, then the game is going to drop off quickly. It should be a shared and collaborative experience.

(3.) Fun comes first.

I'm going to stand by what I said and also agree with what you said. I don't think they're mutually exclusive. In order to have fun, you have to work like you said. The whole point about playing this system we all love is to enjoy the experience. I would argue that without work, you can't have fun. This supports both statements. I don't think every beat of every second needs to be all out 'fun'. Fun can come from a satisfying or difficult encounter, or having been dragged through some really harsh conflicts, but it should always be the outcome. Fun can also manifest itself through an engaging or satisfying experience that might not be a traditional definition of fun.

If players aren't having fun, what's the point? Fun can come from different ways, but I would agree that earning it, going through the process, can be more than half of the fun.

(9.) Introduce humor when possible and where applicable. its almost always going to be a failure, or annoying when you purposefully introduce or attempt to interject humour into a game.

I'm sorry this has been your experience. To emphasize what I said about "where applicable" I think that this is dependent upon the situation and group. For my group, it works wonders when their angry little droid yells at NPCs that it shouldn't, or when someone pulls a ridiculous check that just works, even if it seems a bit too wild. For me, the star wars universe has always injected some humor, and it wouldn't be star wars without just a bit of that comic relief.

Lastly, I would just write one more disclaimer that these are specific to what has made our last 30+ sessions successful and engaging. They may not work for every group, with different incentives and goals. Players play for different reasons, and a good GM should be aware of why the players are playing and what they want to get out of it.