Some orthopedic doctors claim bunions are mostly due to footwear, some from heredity, some "jury is out on this one". But as far as I've watched surgeries, doctors talks, all are concerned with recurrence and as far as I understand, that is why all major types of procedures (osteotomy, lapidus, stitching rope between 1st and 2nd metatarsal (MT)) aim for mitigation of that risk.
But if one want to test hypothesis of footwear, then just fixing (e.i. reducing) intermetatarsal angle (IMA) by moving 1st MT like in lapidus might be enough provided a patient is ready to commit to proper shoes, isn't it? In one "lecture" I recall it was said there are more than 100 procedures. Is there and if yes how is it called the surgical procedure where 1st MT is just moved toward 2nd MT?