You have completely missed the point. If a band decides to sign with a label rather than make their own they sign a contract with said label, now, depending on the type of deal they sign they could owe their label hundreds of thousands of pounds - this is because the label will give them an advance so the album can be made with no restraints and the band can live.A date will be agreed in the contract on when the money will need to be given back in its entirety, this could be a year, 3 months or even by the time a 3rd album is released. Due to piracy live performances and sync deals are the only real way for artists to make their money, for a band starting out this could be a real hard ask if they have a small fanbase, can't get good sync deals due to manager/label/A&R etc etc not being good enough and various other factors.
It's easy enough for already established artists because they are guaranteed to sell out every gig they do at huge arenas, totaly different story for newbies.
Yes, I myself am a musician hoping to get my music out there professionaly within the next two years so I know that to start off you need to pretty much give your stuff away to gain a fanbase *cough* check out Output X guys

*cough* of any kind but we're not talking about unsigned acts here are we, nor are we talking about music released through a distributor.
If you can really justify your stealing of music by the (varying) small amount the artists gets from an itunes sale then all hope is lost with you.