Yeah but there are solutions. After years of being vulnerable to water the iphones are now waterproof. Cars have had engine electronics in boxes with wax in for decades. The cheapest stuff you buy in supermarkets comes in waterproof packaging.
All the things you listed arent things you interact with by pressing on them thousands of times in a day. Its a hard problem to make a keyboard that feels nice, looks nice and is waterproof. Its even harder if you know that the payoff isnt that marketable, I dont think I have ever seen a mainstream laptop advertisment talking about that you can spill stuff on it. Phones barely have buttons or holes anymore and it took us quite a while for the flagship-phones to be water-resistant.
