I assume you didn’t have experience of your older relatives being targeted by professional criminals. I’m not talking about online honeytraps, in some countries these gangs will mix offline and online schemes (e.g. pretending to be social workers, driving my grandma to the bank, buying her a new smartphone to get access to her online banking, which were stopped by her luckily “forgetting” her current smartphone/banking PIN code).
That’s for Eastern Europe. I heard a similar line of reasoning for banning rooted phones in Asia and it’s easy for me to relate to that. It seems as if first-world hackers here just don’t grasp how low criminals can and will go.