Soldered-on RAM and flash, while almost impossible to upgrade, is way more reliable. No vibrations means way less mechanical stress.
It depends, software bugs or different workflow cam cause your storage or battery to fail faster, then you need to throw away the entire device because things are impossible or expensive to repair.
And RAM may be reliable but when it's replaceable it means I can upgrade it and use the device for longer instead of having to buy a new device.
You generally don’t want to run flash near full. That shortens it’s life.
I really don't like the idea that manufacturers MUST provide easily replaceable parts. That will affect product weight and dimensions.
Anyways, repair shops are dealing with chips all the time, so I see no problem of chips being changed, swapped and, if manufacturer provides list of supported RAM chips - those can be changed too.
So do emissions standards, and they also effect performance. But as a society we realise we are better off with them than without.
Forcing a repairable device reduces waste and is, in my opinion, better for the vast majority of consumers.
There is no need to micro manage how a device manufacturer designs their products as long as they offset the pollution they create by either paying the local governments to dig more landfills or recycle their own products or send it over to someone who can recycle.
There are still open problems on how to measure the pollution but it's a more flexible approach than a repairability score.
Markets are not perfect, so why does regulations need to be perfect? They just need to be better than the alternative.
Except a rating like that doesn't actually indicate expected average device lifetime at all. It's common knowledge Apple devices are low on repairability, yet they have average device working lifetimes and post-sale vendor support periods much longer than the very best you'll find among their competitors.
You can also see this from the way they retain their second hand value for years longer than competing devices with much higher repairability scores. People buying these devices second hand know perfectly well they have practical longer working lifetimes than their competition, and they're willing to pay for that.