If a person drinks 3 liters of water a day for their whole life, that'll be about 100k liters total. Assuming it takes about a minute of actual drinking time to finish a liter, that's only 100k minutes, or 1,667 hours of drinking time, so it's no wonder we're not experts.
10k hours of actual drinking fluids seems pretty absurd, to be honest. Like I'll throw out random numbers of 30 seconds to drink 8 oz of water. That means to make 10k hours you'd have drank 9.6 million oz of fluids.