Note that when most shoe companies advertise their shoes as "wide", such as Shimano, the shoe is only slightly wider across the ball of the foot via a little extra material in the upper. The sole (last) of the shoe is typically the same width as the regular width shoe. The shoe then narrows radically in the toe box which is where the bunion forming issue is. The inner (big toe) and outer (little toe) suffer the most from pointy toe box shoes because it's those toes that get forced inward and can't straighten-out in the shoe... causing a bunion over the years.

I, too, have a Morton's neuroma in my left foot and the only way I get lasting relief is to either go barefoot or wear very minimalist sandals so that the shoe isn't compressing my toes together and causing the pain.