Of course you can trade without experience and knowledge. It's simply either BUY or SELL. But if you want to achieve consistency profit in trading, that will take many years of experience and knowledge. Furthermore, it depends what sort of strategy you want to use to approach the market.
If you prefer more aggressive style of trading, then go for technical analysis and look for speculative or naked trading (Most newbie starts from here).
If you prefer more conservative style of trading and risk diversification, then go for hedging strategy which needs more math approach. You have to familiarize yourself with Delta, Gamma, Volatility etc., how to manage your daily position and profit mainly derive from market volatility.
Honestly you are sort of wrong. You "can" trade without experience and knowledge but that is not people are asking or discussing here, they are not really profiting if they trade without any experience or knowledge so what you are saying that "if they have access to a computer and an internet, and if they can read and write, that means they are capable of starting an account and trading", do you really think that could be the thing we are discussion here? The "ability to operate a computer"? Could that possibly be the situation?
Trading without experience and knowledge is something that will lose you money, you will not profit unless you are very lucky and that is why I think people are looking to profit from crypto by learning how to trade first. I believe it is going to be a tough situation if we lack everything and still trade just because we "can".