They're not. To be honest I'm kind of baffled why people keep equating the two in their heads. I don't want to be "that guy", but use your imagination.
Example 1: Low-risk person forges papers to claim they're high risk or in a situation that justifies getting a vaccine Right The Fuck Now, subsequently jumping through a bunch of hoops to get a spot in a highly crowded queue.
Example 2: Person shows up at the end of the day in a vax center that is throwing away 50 doses if they can't get them in arms before people go home.
Example 1 is someone being trashy and selfish, stealing a vaccine from someone who might be able to get it today, result mostly negative. Example 2 is not stealing anything, but rather preventing a vaccine from being wasted and thus a net positive result.