@noyoushutthefuckupdad It's not a rip-off, it's an adaptation (in Spain the title was even translated as The Magnificent Seven of Space).
And, while I unironically respect your opinion, all cinephiles that I know, even the most pedantic among us, love it. Maybe it's a movie you have to watch as a child to fully enjoy it, I don't know.
Also, it was a John Sayles' screenplay. Great writer and an even better director later in his career.