Because they have to withstand 10+ years of being outdoors constantly in every condition from freezing winters at -40F all the way to blistering summer heat at 120F, along with driving rain and wind, to ice and snow.
Your iPhone camera would be toast in a week.
It’s daytime running lights without automatic headlights equipped (or at least turned on).
100% not a manufacturer issue, it’s completely a dumbass driver issue.