As others have mentioned, the Galaxy S5 was water resistant and had a replaceable battery. Phones are generally not water proof, so don't go dunking them in water expecting them to work. Use a case for that, also if it floats all the better.
Adding a sealant when you close it isn't a huge chore, although it's nice to be able to just replace the battery without any tools, it's better than charging. Also it would still be water resistant until the first battery change.
Watches have replaceable batteries while having replaceable batteries, too.
As a side note, if you drop electronics in water, take the battery out before taking them out of the water, so that the short doesn't destroy them. The battery will be toast, but that's cheaper to replace.
Legally the output of the training could be considered a derived work. We treat brains differently here, that's all.
I think the current intellectual property system makes no sense and AI is revealing that fact.