A ground-level, rail-mounted tube doesn't expend energy holding itself against gravity, and faces less wind resistance than an airplane in orbit. That means operating the hyperloop would require less total energy expenditure than operating an air plane.
But, a massive expenditure of energy to build this thing and connect it to where you want to go
Massive expenditure of energy to build this thing? What does that remind me of? Something called the New Deal, I think. Where a country built these expensive bits of infrastructure called roads, when how all anyone needed were horse carriages.