For practical purposes, you can’t secure a dwelling without signing a long, complicated contract (be it a lease or a mortgage note). Yet dwelling is a necessity, even more so than a phone. And, in these contracts, so much more is on the line. According to your argument, you should not have to be bound by the terms of these agreements. You may indeed believe that, but I hope you can see how much of our society is based on the assumption that these agreements have force, and how far we are from moving to a state where they do not. You may wish it were otherwise, but there is essentially no chance of that change being enacted in the foreseeable future.