It's cool.
And honestly it'd a pretty boring world if everyone held the same opinions.
In regards to Sera's reactions and violent beating of the noble, it's going to sound possibly mean or pernicious here for me to point out, but I feel obligated to ask you... why didn't you feel that sense of dismay when the informant was murdered by Lord Pel?
You see, Sera was outraged by that murder, even though the poor fellow was (obviously in the context of the scene) a redshirt doomed to die, his death was no more or less sudden and violent as Lord Pel's. Was it possibly because he lacked a name? He was a 'background character' and not a featured character? We as an audience have our obvious biases, and I cannot help but feel that those that sympathize with Lord Pel do so more because he has prominent speaking lines and 'characterization' as opposed to the poor doomed informant,
I think in a way, Sera's value for life, particularly innocent life, is shown and demonstrated far more visibly in that scene than you perhaps give her credit for.