I understand that by changing the roles of some characters the role of the soldier fell into dad robinson (You raise an interesting point. At the same time, I think it's clear they were trying to add diversity to the show. There are only seven main characters, and they went from an all-white family to a mixed family, made Don Latino and sex-swapped Dr. Smith. Not that that discounts your criticism, but I do think we should temper our assessment of their motivations by looking at the broader context.
I was initially cool to Don, thinking him a poor man's Han Solo, but the character grew on me as he became more rounded. He's a smuggler, yes, but he's also a fundamentally good guy who brings an outsider perspective to the flight of the privileged from Earth. Other than Don, only Smith could provide that perspective, and Smith is the villain.
Don's relationship with Debbie the chicken ended up being one of my favorite parts of the show. It's such a small detail, but it shows that he's both heroic and compassionate. I certainly didn't end up thinking of him in a negative way.
although Latinos represent the third most important ethnic group in the armed forces)
I do not think it's wrong for Don to be Latino, nor would it seem bad for me to be the maintenance worker of the ship, it's an honest job.
and I liked how they presented it at the beginning of the series, someone who has a job as a mechanic and cares about helping other people.
my problem with the character is that they did it a trafficker
and I think that was a mistake, it was totally unnecessary