Tire dusts are also a factor, for example. Plastics aren't always non-renewable either, some like PLA can be made from sugar cane wastes.
No way it's ever going to be environmentally good thing to source extra 2 gallon-water worth of energy per 1 gallons of water just to move the bottles around. Burning shredded corn meal bottles using some sort of smart home electric kiln is going to make a lot more sense.
The question will be what leaves more undestroyed plastic waste, not whether or not it is non-renewable, but if we can get to a point where using biodegradable plastics works for bottles, then that would change things significantly. Burning is insufficient, because people will keep dropping bottles outside the home; it needs to biodegrade fully without that kind of heat.
EDIT: There are potential hazards of bioplastics even when they are degradable. Not saying it might not become a solution, but it's not yet clear.
https://www.sciencedaily.com/releases/2023/06/230601160216.h...