system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] If Jedi are not to develop attachments, how does having one Master teach one Padawan seem effective?
gpt
It's far more effective to have one-on-one training, particularly out in the field.  Having two padawans means spending half the effort on each one.  One-on-one, you have more time and energy to spend helping your one padawan to grow and learn and develop, and to keep an eye on them to prevent their mistakes.  It may be more efficient to teach Jedi multiple at a time, but that means it will take them longer to master their abilities and make them more likely to stray from the proper path.

Also, having a relationship with someone is not the same as being attached to them.  There is of course going to be a relationship between Master and Apprentice, just as there are going to be friendships within the Order.  That's not the problem, the problem is not being able to let go of them - to put the will of the Force or the good of a planet above that person, to let them die and fade into the Force without letting the loss consume you.

When Anakin fears losing Padme, he goes to Yoda for advice, and Yoda's response is not to tell him to cut that person out of his life, just to let them go if it is indeed their time to die.  "Mourn them, do not. Miss them, do not."