Incorrect use of reflexive.

He was just making informal comments.

Pope Leo has a BS in Math, and a Master's and Doctorate in Religious Studies, etc.
Probably didn't take a lot of English grammar classes.

The content of what he says is the most important thing to consider.

Written and oral language is quite different.
Some countries have a big difference.
The written style is quite formal, and the oral is more street talk.
Quebec is a bit like this.

English is an evolving language and styles and usage changes over time.
So the grammar may shift around over time.

his personal holy trinity of Me, Myself, and I. 🤪