Nah, the idea that "one that's mentoring those around them to do their job well" can lead to promotion is also just an example out of many.
My experience is that the biggest promotion driver is always the product success. And the product success also vary between organizations. I've seen a huge project promoted people in the process, but in the end was entirely canceled and delivered minimal value, while the promoted folks wisely left the team. While in other places, if the product ends not getting their customers happy, execution excellence is not rewarded much.
If product success is not easy to get, the team can be very excellent, but wont have much growth space in seniority. That has nothing to do with their personal skills etc.
My experience is that the biggest promotion driver is always the product success. And the product success also vary between organizations. I've seen a huge project promoted people in the process, but in the end was entirely canceled and delivered minimal value, while the promoted folks wisely left the team. While in other places, if the product ends not getting their customers happy, execution excellence is not rewarded much.
If product success is not easy to get, the team can be very excellent, but wont have much growth space in seniority. That has nothing to do with their personal skills etc.