AZDuck is pejorative saying "whole purpose of corporations is to evade personal liability" and Damoan is wrong to say "Avoiding personal tort liability for oneself certainly isn't the reason for forming a corporation." Well, maybe he's right on the tort part of it. The prime purpose of a corporation, and most particularly in US legal context a C-Corp, is to manage and mitigate personal risk, and to pool risk & reward of multiple persons, real or corporate. An owner or shareholder is only liable to extent of their capital invested in the corporation. Properly incorporated and managed, owning $100K of a company that goes bankrupt means you lose your $100K, but not your house or other assets.
True, you can't execute or jail a corporate person. But the government can and does sue corporations out of existence, or remove their ability to operate by revocation of licensing or other regulatory means.
The problem, or benefit depending on your view, of the corporate rights question is that the owners and actors of a corporation are real persons, presuming working in common interest. Can the State suppress free speech or anything else of real persons acting through the Corporate form? I know many do argue for just that, with the ultimate goal of either outlawing corporate persons or making them so useless as to be abandoned in practice. My real problem here is that if the State claims the right to tax a corporation, then the corporation must have the right to redress for grievances and all that.