Benefits for removable batteries have been posted again and again in this thread and others. You keep saying water proofing is a weak argument, yet have not provided a single other benefit to sealed in batteries.
Don't claim something is the weakest argument for sealed batteries without providing a single, better reason.
Remember zero I indicated that most of the benefits of sealed have to do with options that become available and fewer engineering compromises.
More options and fewer engineering compromises are both benefit categories. To elaborate
More options
The battery can be placed in difference places when it does not have to be accessible by a door or slot.
The battery can be different shapes and sizes when it doesn't have to be accessible by a door or slot.
The battery can be larger if more space (air and plastic housing) aren't required to contain a user removable battery.
I personally don't like glass phones, but sealing the battery enables a glass design.
It is easier to provide water resistance with a sealed battery
There are many more of these
Fewer compromises
A device with a sealed battery has more space available to properly control heat. This could also go in the above category because it means less wear and tear on the battery and less wear and tear on the SoC and other components.
A device with a sealed battery has fewer structural compromises, a seam isn't required and there's no need for a thin door, etc, etc.
A device with a sealed battery has less moving parts being pulled upon or pried upon by people.
There are many more of these
Other
A device with a removable battery encourages consumers to abuse the battery, which promotes bad habits and will diminish their experience with other devices.
Hot swapping never has been "good" for your device. Its damage has been mitigated in recent years but it is still a nearly unconscionable action to perform on a device.
Alternatives exist that will support the vast majority of consumers. These include: Portable chargers, fast charging, batteries that are enormous, displays and processors that both consume less battery to perform identical tasks, smarter software that is capable of preserving battery life longer, etc.
There are many more of these.
There are at least a couple dozen reasons that an OEM would want a battery to be sealed.
Now, the reason I asked for your side to try to generate some of these ideas is because I find it absolutely ridiculous that not one person is capable of imagining a single point counter to their own, whether they would agree with that point or not. To me the inability or unwillingness to do so represents an unwillingness to have a sincere debate. But if you had actually read any of the points I made in prior posts, it'd be likely that the big clues contained within me stating that my position includes "more options and fewer engineering compromises" and the fact that I stated multiple times that my position does not rest on water resistance would have lent some direction towards being able to consider at least one example of either category.
I've also asked you and others to provide the pros and cons of a removable battery - a request that you and everyone else except Mooncatt has so far ignored. So as we have it, there are dozens of reasons an OEM would not want a removable battery and there is only one reason, brought up so far, that a consumer would want it to be removable, and that reason is actually argued against by at least two separate reasons you would want to seal it.