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You know when someone posts about trying to fix something where they removed a part with the wrong tool and now it's jammed and broken and there's someone carving up a gravestone in memorandum? Well...
So yea that stitching was functional but it looks like you left the inner and mid sole part stuck onto the outsole. You've left the comfort part what your foot rests on, stuck to the durable part that touches the ground.
Normally a cobbler would never deconstruct a shoe like that. They would leave the upper and midsole together by sanding off the outsole with the rough band, so never touching the stitching.
If you found someone feeling really adventurous, I guess they could glue your upper to a new one-piece sole and heel, and you could place a new midsole/insole yourself, for comfort.
If you found someone with time and desire, they would use a thin oversized insole as mid, and glue the upper to it before stitching the whole thing to a new outer... but you're really risking the shape of the upper being wrong now.
Where's that GT track end thread?
Depends on the construction, most/all are glued and stitching is decorative. Main issue is that it doesn't just pop off, the rubbery soles are a mess when being removed. You gotta use the rough band and it stinks and makes a mess.
Different soles glue better than others, and all must be shaped after attaching.
Also stuff like vibram and commando are more expensive cos of the branding.
Just see what timpsons say. But yea... post some pics as you DIY them later.
Tldr: rubber sole desert boots aren't made to be repaired.