Lockless Door Knobs on garage door?

[Sean Kuhn]

I have attached garages on my units that come with garage door openers and everything. I currently have keyed entry door knobs on the garage door from the house to garage and was thinking of replacing them with regular door handles that don't have locks. This way I don't have to change as many sets of locks when a tenant moves out, just the front door. Can anyone think of why I shouldn't do this? Is this a bad idea?