1-I meant keyfobs as well! Many times I scramble to find them before leaving the house. I can misplace them accidentally. I always know where my phone is, or I can just ping it.1)Most cars have had alternative to physical keys for at least 30 years. Keyfobs have been extremely popular for past 15 years. Back in the 80s there were several American cars that used keycodes on the door handle.
2)I'm not against technology. But my iPhone/Watch can get lost, stolen, fogotten, etc. too! It can also get corrupted. Apps can (and as I provided with my banking apps) and WILL stop working until you upgrade the app. Oh, don't forget to upgrade iOS (which will very likely force you to upgrade some other apps as well as change/break something else) so the new app can be downloaded in the first place. Don't forget to register your car/id/home address/email/phone/license plate/etc for "safety" in case there's ever a problem and/or you need technical support. Do think maybe...just maybe...it would be somehow beneficial to the app creator (or Apple) to know that you live in zip code 06498 and drive a 2019 BMW 5-class automobile and usually unlock your car every weekday at 8:15am, lock it at 8:55am, unlock it again at 5:05pm, and lock it again at 6:15pm? And then you wonder why your phone magically rings at 6:20pm every night trying to sell you 3rd party car insurance as you barely got your coat off and hugged the kids?
3)You really want to throw in the "increases safety" line? Really? Every company in the USA has used that line for decades whether they are selling me technology or flowers. Seriously. And each and every time I ask them "how?" and far often they can't explain it. Ask your bank the next time how their policy against you depositing money into your son's account is increasing safety. They have no answer, yet they loudly promote it.
My point is that the iPhone (or whatever comes next) is trying to be the central hub for 100% of everything you do/touch in your physical life. This may not be directly responsible by Apple, but the quest is there to do it. The problem with this general "hub" is that it has so, So, SO many dependencies (some of which I listed) and in addition to the dependencies come opportunities for things to fail.
The keyfob that came with my car (and yes I have to replace that stupid battery every 16 months) works just fine thank you very much.
3-your stuff is at the very least passcode protected instead of mostly available to use for anyone with physical access to the item. You lose your fob, you may lose your car. You lose your house key, you may get burgled. You lose your bank card, someone may use it before you realise and cancel it. You lose your ID, someone can use it for their benefit. You lose your phone with all those things, and in theory you may be just fine.