i mean to be fair Star Trek is a product of an imperial, western nation so there are some lingering attitudes like you mentioned that pop up occasionally. It depends on the writer though. Often the humans do have a very colonial, imperialist attitude towards other species. Sometimes Starfleet is purely a research/diplomacy organization, sometimes it operates more like a military. It's a show that's been around for a while so it's inconsistent, but the core of the show has been there from even before Day 1. It's showing a future where humans are better than they are now, not because of the space tech stuff, but because we've fixed our society and how people are treated.