Why is Apple forcing users who accept updates to buy (over priced) Apple brand cords to charge items? Is this just a cash grab? Is Apple using the “extend battery life” excuse they used when caught slowing down older iPhones?

USB PD (Power Delivery) is an industry standard - this standard being adopted by Apple for its Power Adapters. Third-party Power Adapters that fully comply with USB PD should work without issue across Apple’s range of devices.

Be aware that many third-party Power Adapters may not be USB PD compliant - and may instead use other proprietary charging standards. One such example is “QC” (Quick Charge) which is not supported by Apple devices.

Similarly, you should always look for Certified cables. For Apple-proprietary Lightning cables, unless Apple-certified, these cables may not comply to specification - and may not work at all.

Likewise, whenever you are using USB-C cables, ensure that these are Certified USB-C cables. These “cables” incorporate active electronics within the plug that provide essential protection from faults. Non-certified cables may lack these essential components.

Perhaps consider that using uncertified or cheap aftermarket cables and Power Adapters is false economy - as these components can cause serious and/or irreparable damage to your expensive Apple hardware.

I always wonder why on Earth someone would buy a device that costs hundreds and hundreds of dollars and would want to skimp on the cost of accessories that are not certified to work with the device. It’s not like an Apple cable costs an arm and a leg.