Nate, you're obsessing. Not smart to take off adventitious roots like that; they did no harm. Put dirt back over the roots, followed by mulch--shredded hardwood maybe.
As that big wound shows, roots graft to roots, so roots do not "girdle" roots. Once you expose the root collar, no need to expose roots away from the trunk.
As that big wound shows, roots graft to roots, so roots do not "girdle" roots. Once you expose the root collar, no need to expose roots away from the trunk.