If security is that important then why wouldn’t apple make the phone display a pop-up or splashcreen to the user informing them of the modification, whilst still allowing the phone to be used? There is no need to render the device unusable, just leave the choice up to the user. I think it is much more likely that these measures are taken to monopolise the repair of iPhones and overcharge customers. I think talking about this as a life-threatening problem is quite overdramatic.
Capitalism breeds innovation