Maybe read through a thread before just posting to the original poster. Apple has publicly said they will NOT need to reduce the processing power of the new chip. And you can find plenty of videos which demonstrate the back glass is no easier to damage than the phones preceding these new phones. If you want to destroy a phone, it doesn't take a lot of effort. Not with an iPhone. Not with a Pixel. Not with a Samsung. Any phone ensconced in glass can be broken.
It would seem incomprehensible you'd spend this much on a phone and not put it in a good quality protective case? And if you do, you really have little to fear if you accidently drop your phone.
A few pages back are Apple's official words on the topic this thread addresses. You can take your own time to look through the thread.
EDIT: In case you find the posts I reference, I did the research for you:
In a statement to media outlets, Apple is confident that the issue is related to software rather than the A17 Pro chip or titanium enclosure. The company has targeted three possible reasons for the overheating in some iPhone 15 Pro models:
・Apple says iPhones “may feel warmer during the first few days after setting up or restoring the device because of increased background activity.” That’s a fairly common issue with new smartphones but appears to have been exasperated with the iPhone 15 launch.
・Some apps (including Instagram and Uber) that were recently updated to support iOS 17 have been overloading the A17 Pro chip’s CPU. Apple says it is working with affected developers on fixes that are in the process of rolling out.
・A bug in iOS 17 that is “impacting some users” will be addressed in a future software update.
Apple insists that the overheating issues aren’t related to the A17 Pro processor, iPhone 15’s titanium chassis, or its updated internal design. The company also squashed a report from Ming-Chi Kuo that it could limit performance to keep the system-on-chip cool under heavier loads, saying it “will not be lowering the performance of the A17 Pro chip” as part of the planned fixes.