I would agree with you, except for Apple hasn’t changed anything. Apple has added options, but that’s it.
If you bought an iPhone 5 back in 2012, the first iPhone with a lightning cable, it came with a 5 W brick.
You can still use that original lightning cable and that original 5 W brick with your iPhone 12. It still works, just as effectively as it did in 2012.
Apple has just added options, and there always was options. Even with the old 30 pin connector, the iPhones came with a 5 W brick. They also offered a 10 W brick for iPads, but if it was used with an iPhone it would actually charge faster.
So Apple has not changed anything, they have just added options. Now, you could use the 5 W with lightning cable that they shipped from 2012 to 2019, you could use the 10 W brick they used to ship with iPads, you could use a lightning to USB-A or USB-C cable, you can use any brick you want, you can use a third party brick, Lightning cable, or QI wireless charging pad. And, in 2020, apple introduced magsafe, just a new option in a market full of options to charge your phone. It’s not a requirement, it’s just a new option.