Indiana allows both forms of carry simply because the Indiana code does not address the issue. I'm retired, and I carry from the time I get out of bed, until I climb back into it.... and I carry concealed. I carry concealed because :
it avoids the understandable "man with a gun" call to police
it does not draw attention to me
I've carried concealed since the mid 1970's, and I'm too far across the river to change now
if I can't avoid a self-defense confrontation, I want the fact that I'm carrying a gun to be a complete surprise to everyone but me.
it's my choice