There are clearly 2 sides of the argument, one for savage and harder and one for the rest, or, to put it another way, one where your DPS/performance matters so that you can avoid hard enrages or ones where it doesn't matter, aka the fights will just go on and on with no hard enrage.
Going with the fights that contain a hard enrage, There is obviously some threshold that needs to be met. The problem is when this threshold is not met. How do you determine where the weak link is so that it can be fixed? If people die/mechanics aren't performed correctly, then it is an easy fix, however, what if noone dies and mechanics are all performed correctly? There is no easy way to determine player A is underperforming by a large margin. If you could determine this, you can then help the player if you can. However, if you are going into the harder content there is also the expectation that you know your job. Unfortunately, there are people who do not know how to play their job and still go in expecting to be able to clear it.
So, some sort of measure is needed for encounters with hard enrages. However, you then have the issue of, do you allow the whole party to see it, or just keep it private for the individual. This then goes back to what I said before. Is the underperforming member going to pipe up and say, yup, I'm the one holding you back. In my experience, that does not happen, which then means, in that encounter, the party as a whole is still ignorant to who or what is preventing the clear.
Yes, it is a weird area. I am hoping people do see both sides of the argument, it is just because they feel stronger in one way or the other, they fall on each side of the fence.
As for the comment on 'strong competitive aspect' and how it essentially made people feel bad, as a counter argument, when I used to go into savage and EX content actively, me and my co tank would always have a friendly competition about who could do the most DPS. It was a healthy competition between both of us, call it a rivalry if you will, however it pushed us to both try harder and be better players over time and there was never any bad blood between us. I'm not saying that because I did not experience the degrading behaviour, it doesn't happen, however, I am saying it does not always result in degrading behaviour.