Why every people say that?
It is so difficult activity
it is difficult for people who have no enough capital to start... and some newbies say it is dificult who never tried and don't even know what mining is.It is so difficult activity
if you have enough money to purchase everything(including the electricity cast) you can do it with no issue.
because every mining is uselss and full of loss and full of risk . there is always a chance to ran away the mining site any time without notice . hashocean mining is a best example of you topic that you have started .
don't call mining useless. there is big deference between mining and cloudmining. cloudmining have no any relation with bitcoin mining. they run on hype bases.