I think what you mean is that having the power does not make it right (in the moral/ethical/good vs bad sense).
The issue here is that the word "right" has multiple, different meanings. The meaning that is intended depends on context. In this context a raid leader's rights and powers are pretty much synonymous, but have no bearing on whether what they do is right in the moral/ethical/good vs bad sense.
Having the right (as in power/authority) to do something has nothing to do whether it is the right (as in good/ok/nice) thing to do.
To illustrate the point:
"The raid leader has the right to kick any player from the group even when it's not right to do so" -> "The raid leader has the authority/power to kick any player from the group even when it's not ok/nice/a good thing to do so
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I am comfortable in letting anyone else here be the judge of that.