This is a huge point.
Add in another environmental disaster is that it will cause more batteries in the landfills. Wireless charging degrades the battery faster (uneven charging rates, high heat), so they will be replaced and discarded sooner.
Since the iPhone replacement cycle appears to be between 2 - 4 years, with about 50% replacing every 2 years, (based on what I could find)n it seems doubtful battery degradation will be much of an issue.
The impact of wireless charging on battery life seems to be open to question, with the possibility it actually increases battery life depending on how you charge:

Does wireless charging degrade your battery faster? We asked an expert
There’s no denying the convenience of wireless charging, but as more and more of us ditch the cables some fears have emerged about the potential impact on battery longevity. We decided to ask some experts and find out the truth about the impact of wireless charging on your battery.
