It's hidden in the sense that the normal user does not see the true cost on their energy bill. You perform a search and get the result in milliseconds. That makes it easy to get the false impression that it's just a minor operation. It's not like driving a car and watching the the fuel gauge and see the consumption.
Of course one can research how much energy Google consumes and find out the background – IF you're interested. But most people just use tech and do not question or even understand.
I kid you not, on Xitter they already argued that the increase in flooding is due to the clearing of forests for wind turbines. Also that wind turbines slow down cloud drift so much that much more rain falls in an area. So, wind turbines are the evil cause for all that.