For scissors, however, nothing is more expensive and delicate than a decent set of haircutting shears
I have a very cheap pair of haircutting scissors. I've used them to cut thin aluminium sheet. Still work OK for trimming my beard. I'm an absolute monster🙃
As for knives, some 10 years ago I bought a cheap (I think 2 or 3 €) Swedish-made fixed blade with nylon grip—the kind contractors and builders use. Thing is pretty much indestructible, cutting open tin cans and splitting of splinters from logs for firestarter like it's nothing. Has a nice carbon steel blade and used to have very nice hollow ground that has been long been downgraded to flat ground due to many, many sharpenings.
Water only gets stuck in your ear if you have wax built up in your ear canal. Regular washing of your ear with warm water (and nothing else!) keeps the wax build-up under control and water will just pour out of your ear canal as soon as you level your head.