WS2812B current draw
This question has been asked here so many times it is getting boring. A properly designed load will only draw the current from the power source that it needs. The power source, if it has greater current capacity than the load requires, is not going to somehow force the load to take five or six times the current that it needs. Assuming that everything stays at the proper voltage of course.

Think about your cell phone charger that you plug into the AC mains receptacle in your house. That receptacle can likely supply 15A at the mains voltage and yet the charger only needs maybe 0.1A or so. By plugging in your cell phone charger it does not explode due to the 15A capability of the receptacle.