Without a way to measure 'being a better person' we cannot tell what effect MA has, if any.
"I believe/My experience is/I think/I feel" - the plural of anecdote is not data.
I think MA makes you 200% a better person with every session. Meaningless without a yardstick. All we have is opinion.
In the studies I mentioned earlier they looked at easily measurable data such as school attendance, decrease in "bad" behaviours and/or disciplinary measures and exam results.
I guess it depends - as others have said- if that's how you define better!