Do any of you guys know what the benefit of letting them do it is?
The advantage boils down to
- You're sure it will work as expected.
- Spare you the effort of doing it yourself.
Is it worth it? Depends your skill level/interest in installing a new android on a phone (I have zero interest in doing that for example, and that is despite my computer running Linux), and what your time is worth to you (do you earn more in the time it would take you to do that yourself? If yes, it may be a reasonable choice to let someone else do it).