Is the removal of shoes an admission of one's status
1) as a mere human being?
2) as socially lowly or religiously humiliated?
3) as guilty and convicted?
I am not convinced that in our modern culture, any of these indicators (which were commonplace in ancient days) say the things they once did. We note the action performed by Moses or Joshua, which include a stated cause, and cf. David 2Sam.15:30, Is.20:2,4; Jn.13:10.
Moses' being in the presence of God required some fit acknowledgement. Prostration was not demanded by God (though he might have called for anything). Rather, he is satisfied with this outward act of shoe-removal.
We also who enter into the presence of God must be given a token "washing," i.e. baptism. This is a one-time humiliation, and thenceforth we are reckoned clean. We humiliate ourselves inwardly. We do not read of the nation of Israel removing their shoes to stand in the temple. I question whether this was an ordinary encounter, and an ordinary act of worship.