The upward moral trend I referenced was supported by a linked argument. Therefore it was not an unsupported opinion.
"People who favor conservative positions are likely to be higher than average in arrogance. They oppose the upward moral trend because the concept of equality challenges their need to feel superior to others."
They oppose the trend because they are arrogant.
They are arrogant because they oppose equality.
Oppose equality = opinion
Thus arrogant = opinion
Thus oppose trend = opinion
And this is why your admitted bias matters.
Logical deduction: If progressives are aligned with equality, they cannot at the same time feel superior.
A common refrain in middle-class progressive politics is that the only reason working class people vote for conservative candidates is because they are stupid bigots who are too dumb to think for themselves. Some even go on to make arguments that such dumb people should have less of a say in elections than smart, educated people (i.e. themselves).
This is very much 'feeling superior'.
You can see such attitudes expressed in many RF threads on Trump and Brexit. Go back and check the ones fresh after Trump's election if you want some evidence.
Look at the trend of 'milkshaking', this is progressive people feeling they have the right to assault non-violent people who have differing political opinions to them.
This is very much 'feeling superior'.
I could go on, but you get the point.
The fact that you want to create hypothetical arguments for me to consider is evidence on its face that you know you haven't put a dent in my offering.
Or you could say the fact you won't answer it is evidence you haven't considered the implications of your 'logic'. You have subjectively defined another group as being 'arrogant' because they 'oppose equality'.
Some people will subjectively claim you 'oppose equality', thus making you 'arrogant' because you 'oppose the upward trend'.
So:
You have proposed 'expert panels' to make government decisions. There are certainly some progressives who would see this as enshrining privilege of the white, cis-het patriarchy (you may disagree, but that's beside the point).
As these people believe they are more aligned with equality than you, does that make them less arrogant? Does your unwillingness to accept their views on the best way to achieve equality necessitate you thinking your human worth is greater than oppressed minorities?