Bitcoin price consist on demand and supply or human as you mentioned above, technical isn't since programs, protocol, technology, blockchain, mining etc have nothing to do with Bitcoin price.
Is high volatility a plus or minus for crypto? Can we keep the natural volatility but raise the level to which the value of the currency falls?
Any investment will have volatility, it depends on which asset it's since some asset do have low volatility, while the other are high volatility.
You wanted to control Bitcoin and there's a limit of each day how much the Bitcoin can drop or increase? well that's against of Satoshi vision who make Bitcoin is decentralized, it's pretty much like a stock who have a limit on each day.