You are talking like any normal consumer is going spearfishing with his smartphone. They're not. Being able to deal with some rain at most it's all it's needed

You are talking like any normal consumer is going spearfishing with his smartphone. They're not. Being able to deal with some rain at most it's all it's needed for normal use and was achievable by electronics with replaceable batteries for decades. Any more than that is just falling for the spiel given by companies known to be hostile to de idea of prolonging the lifetime of their products.