Why is Seven Samurai so good?

On April 26, 1954, "The Seven Samurai", a Japanese film directed by Akira Kurosawa starring Toshiro Mifune, was released. It was Westernized as the film "The Magnificent Seven ". A short excerpt from the article:

"Seven Samurai plants its narrative hook right at the start, as a group of bandits decides to wait until after the harvest before raiding a village in the mountains. They’re overheard by a farmer, who conveys the bad news to his fellow villagers. After much wailing and breast-beating, they resolve to hire samurai for protection, but being impoverished, all they can offer as payment is rice. We then follow the village delegates on their seemingly impossible quest to convince proud samurai to join their cause. After some initial setbacks, they stumble across a mini-drama in which a veteran warrior called Kambei (Takashi Shimura, one of Kurosawa’s favourite actors) astonishes onlookers by shaving off his topknot (a symbol of samurai pride), so he can disguise himself as a bald monk and rescue a child being held hostage by a thief.

The film has the mother of all ‘assembling the team’ sequences, now an obligatory part of so many action movies
Once the experienced Kambei is won over to the villagers’ cause, the film launches into the mother of all ‘assembling the team’ sequences, now an obligatory part of so many action and heist movies. One by one, six other rōnin (masterless samurai) are persuaded to participate in a probable suicide mission that will bring them neither money nor fame: an old war buddy of Kambei, a skilled archer, a cheerful fellow reduced to chopping wood, a master swordsman who just wants to perfect his art, an untested young samurai who is eager to prove his manhood.

And, finally, there’s Kikuchiyo (Toshiro Mifune, Kurosawa’s other acteur fétiche), a half-crazed swaggerer whose claims to be a member of the samurai class are almost immediately exposed as fiction. Shrugging off the others’ ridicule, he tags along as they trek back to the village."