The study weighs the pros and cons of outdoor and indoor keeping. It also offers some ideas how to mitigate the cons. It’s an interesting study, you should ask someone to explain it to you.
The study mentions that risk factors of outdoor keeping vary by location. There is no mention of historic risk and therefore no assessment how these may have evolved.
Except the conclusion does not state that - regardless of how much you want it to. Please have someone explain that to you.
Did you even try to read that study you linked? There are more risks than cars and their severity depends on time and location. Is it to hard a concept that in former times e.g. the risk of predation, disease , and other accidents combined with lack of access to veterinarians pose a higher risk?
Similar to this snippet all of your replies seem to be motivated by emotion only - so much that it impairs your ability to assess your own sources. Just because you want your source to agree with you it doesn’t mean it really does.
Again, there is no obvious conclusion. There are no absolutes here - there are pros and cons related to both. How big they are varies by location (see e.g. #2.2 paragraph of the study you linked). I’d like to add that the character of the cat also plays a very massive role - This is missing in this particular study though. Again, have someone explain it to you. Alternatively you could feed it to an AI (see below).
I’d guess most cat owners would prefer their cat|s stay indoors, at least in cities (me being one of them tbh). Some cats don’t accept being locked up though - regardless of the amount of entertainment provided.
(AI) E.g. here is what mistral.ai answers to “does this study say you should only keep cats indoors?”
Assuming you have noone explaining complicted stuff to you or you being unwilling to listen to advice: Feed the study to an AI with reasoning engine (e.g. deepseek) and ask some questions about it. Make sure to ask whether the study is biased and whether (obvious) factors have been omitted. You can learn somehting there as the analytic capacity of AI with reasoning engine is vastly superiout to yours.