But those aren't safety reasons, it's because they had idiotic equipment.
Everything I've heard for pressing safely is a medium grip, bending the bar to force the shoulder into an advantageous position..etc....
Wide grip was said to cause strain.
Yet, I don't recall any major superstars of yore having any pec tears or strains. In the pic I posted, Nubret is hitting 405 with that grip.
Most of the time when I do it, I use the Smith Machine so I don't have to worry about pinching my hands on the uprights when I rack the weight.
I do the medium grip when I'm more concerned with putting up raw numbers. But, for really hitting the chest (especially after doing inclines or dips), I love that wide grip, especially since I don't have to go much higher than 225 to really pound my pecs.