With these historical if-questions anybody can say just about anything and it doesn't mean much. If's probability to happen was and is and going to be always Zero.
Sad that Stammer had to go through unfortunate injuries. Good thing is he survived them through enough well he managed still continue his illustrious career.
Stammer will likely end his career (as goal scorer) among very top of his era regardless of injuries, missed games, and changing play style, and I'll be very happy for him when a lamp lit 500th time for him. It feels unfair to compare anybody with OV as OV's unprecedented goal scoring spell someway misdirects our perception to consider lower milestones and career achievements more mundane than they actually are. For example, that 500 career regular season goals milestone, a player regardless of era is among absolute top, but it feels 'easy' when we put that against background of what OV is doing.; So damn "easy" that it was only January 2016 when he scored his 500th goal. OV is setting new standard, but because that standard is so high level, we shouldn't necessarily use it as base comparison when looking to other great goal scorers, not at least without asterisk added.*
Stammer is one of them.
*a guy scoring some 50% more goals than the next guy of his era isn't actually very good measuring stick, as his individual performance level impact dramatically even to average of Top 10, skewing the number
ADD: in other words, OV cannot be considered "normal" or "typical" top level goal scorer among his peers - the norm of this (OV-) era top goal scoring careers is at Stamkos-Crosby-Kovaltchuk tier, which is that some 33% lower level = entirely different tier
Edit: OV's 500th goal was actually scored January 2016, not October -> corrected. Doesn't change the point.