These kind of people should not be involved with mining. If you don't have the time or the energy to get involved with physical mining then you don't need to contribute to the demise of a currency by helping to centralize it. If you promote cloud mining are you promoting centralization, particularly if you are supporting large mining entities like cex.io. That would be like people wanting to get involved in helping put out a fire by standing with a garden hose while blocking the path of a firefighter with a 3" line.
There are many ways to get involved with crypto and make money. Mining is but one aspect. People are looking for easy money and they think they can throw some cash at a website and have more cash come back.
The part I bolded is exactly the case the majority of the time. People think, "I can just leave my computer running and it will make me lots of money!" Because there is indeed money involved, people will find creative ways to sucker you out of yours. It truly amazes me the sheer number of people unwilling to do the slightest bit of research, yet willing to toss money at a thing. It's no wonder scams like Lunamine are so prevalent... people keep lining up to throw away their money.
I think that anybody that thinks that he can be rich by having its computer running is naive to say the least. Nowadays with all the scam coins and also with several non-reliable providers you have to be extra cautious. You have to think very carefully before you decide which coin to mine, you have to make your own research and bear the risk that is involved in your decisions. There is no magic wand that can turn a miner into an endless cash machine. Mining is prediction and luck. We have seen coins starting with the best intentions dying within weeks (market manipulation, whale attacks, etc.). It is a risky region with no standard revenue, but if you play your cards right you may make some hefty profit. But most of all I think that you should enjoy mining, enjoy guessing which will become the next coin of the day.