Let's say one of the partners in a partnership is being sued, and someone wants to go after her practice partnership interest. It can't be done. A credit cannot just take over a partnership interest. At best, all the creditor can do is receive income from the interest, but the creditor will have no ability to sell the interest or have a vote in the management of the partnership. It's different for shareholders of a corporation.
Corporate stock is just another asset, like a car or a house.
Creditors absolute can get that asset. When they do get corporate stock, then can vote the shares like any other shareholder. Not a pretty sight. But by having a proper shareholders' agreement you can give the other shareholders the right to buy out the shareholder in trouble. That's an extreme case.