Companies have a need to make money, for better or worse, that’s how it is. Companies like Apple have to balance the economic viability of maintaining developers on software - for them to keep being updated - with keeping users happy.
Modern smartphones are not analogous to gas cookers. They’re about 100 times more complex, with third party, hardware, software, security and economic interplay.
Reducing it to “My fridge worked for 20 years why doesn’t my iPhone?” is just a stupid argument. Your phone is not a banana.
This is.. not true. A lot of hardware change is involved in modern mobile device security. Apple has come a long way from the iPhone 7 in hardware security and no amount of patching software is going to introduce a new cryptographic coprocessor.