Review the note-list script before running it

$1 is the first argument and $# counts arguments. The guards require
one explicit directory path; they do not prove ownership. find selects
regular .txt names and sort orders their paths. This is a read-only
listing of the supplied controlled tree, not a deletion procedure.
The output below is retained from an earlier Bash 5.2.21 exercise.

Scope: one owned supplied tree, no network, no elevated privilege.
Inspect script and all inputs before running. Run with Bash, not sh.
owned-tree/notes/alpha.txt = first note (newline)
owned-tree/notes/meeting note.txt = second note (newline)
owned-tree/notes/archive.log = log only (newline)
bash list-notes.sh ./owned-tree
Observed stdout with Bash 5.2.21, ordered by C locale:
./owned-tree/notes/alpha.txt
./owned-tree/notes/meeting note.txt
Running twice on unchanged input should print the same lines.
This format is for this controlled text tree, not filenames with newlines.
The script lists recursively, including dot-named .txt files if supplied.
It does not follow encountered symlink directories by find's default.
Question script's only command: find "$1" -type f -name '*.txt'
Does this command list or delete files? Enter list or delete.