You nailed it on the "assuming they do the job right." The other part is that there aren't any orbital tow trucks to get rogue or broken satellites out of orbi

You nailed it on the "assuming they do the job right." The other part is that there aren't any orbital tow trucks to get rogue or broken satellites out of orbit or out of colliding paths. Plus since you never know where it might happen, and the delta-v would be pretty extreme to go very far or very fast, let alone both which would be needed to prevent a collision of an out of control satellite. The penalty of screwing up could be large, and there aren't many mitigations available.