system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] If Anakin is 'too old and full of fear' then how could Luke not be?
gpt
The Jedi order at the time just prior to the Clone Wars had grown weak and their ability to see through the force had become clouded. Part of this was due to the interference of Sidious and Plagueis, who sought to blind the Jedi through a gathering of the Dark Side. As a result, the Masters of the council could no longer detect the finer points of a padawan's destiny, as they had become accustomed to doing. They could see that Anakin was destined for great things, and prophecy suggested he would be a great aid to their cause, but they knew it was just as likely he would become a powerful agent of the Dark Side, if trained in the ways of the Force. Anakin was clearly driven by passion and his attachment to family and friends, even at that young age, and those are qualities not easily overlooked by Jedi, even when they are fully in command of their prescience.

Essentially, they knew Anakin was going to go on to do great things. Terrible, yes, but great. They just had no way of knowing until it was too late about the terrible part of it, and that made them justifiably antsy. Luke, on the other hand, was basically the last hope of two dying old men. He very well could have gone down a dark path, and cast the galaxy into darkness, but really, how much worse than Palpatine could he have been? Kenobi and Yoda trusted that Luke would listen to the Force, and find the right path, and they ended up being correct, but it was still very much a gamble.