I am not a delegate, but I am active on the forum on those proposals that interest me.
Nevertheless, I have interests as an individual and I also have interest as an investor. I am not part of any specific protocols although I help out on many.
As an individual I should be looking in whatever proposals align themselves with my vision of what it means Optimism.
As an investor I should be looking in whatever proposals align themselves with the projects I have a stake in.
In those cases where there is conflict on the statements above, I abstain from commenting.
Is my comment needed in some way? On the proposals/requests maybe not, but I would be voice in favor or at the very least positive/neutral.
You do bring an interesting point of a third category, an interested party if you will. In the example you haven given, rETH adoption would not directly benefit you in any way. But since your knowledge would be above par for many issues related to staking, your VIEWS would be welcome.