You're talking past the OP commenter. Not all companies whose owners enjoy the benefits of limited liability are Limited Liability Companies (LLCs). The other commenter was discussing the general concept of a company whose owners enjoy limited liability, meaning they cannot be held responsible for the company's debts or other financial obligations beyond the value of their ownership stake, i.e. their _liability_ for the company's obligations is _limited_. There are many corporate forms that provide this benefit to their owners, including common US corporate structures like LLCs, C Corps, S Corps, and Limited Liability Partnerships (LLPs). It's important to note that the terminology varies across jurisdictions, so the specific structure we call an LLC might be called something else entirely or might not exist at all.
Which is precisely why the OP commenter framed their argument in terms of the general concept of limited liability. The argument applies to any company structured with joint ownership and limited liability, whether we happen to label that corporate structure C Corp, Private Limited Company (Ltd.), Gesellschaft mit beschränkter Haftung (GmbH), or even Limited Liability Company (LLC).