6. Storing their mined BTC on a hot wallet or on an exchange.
FWIW, hot wallet can meet those criteria.
3. They don't mine straight to the exchange pocket, they understand the risk, instead they choose the best bitcoin wallets, fully decentralised, non custodial BTC wallets
2. They understand the risk when joining mining pools, they don't just find mining pool and connect their hardware, they always choose the best, some pools have increased chances of earning rewards than others.
Fee and payment reward structure (such as PS and PPLNS) also matters.
3. They don't mine straight to the exchange pocket, they understand the risk, instead they choose the best bitcoin wallets, fully decentralised, non custodial BTC wallets
There aren't many mining pool where you can connect to them only using Bitcoin address anyway. These days, many pool expect you to create account.