Maybe, but does the creation of such a category actually benefit workers if it means that there end up being fewer full-time workers and large numbers of people

Maybe, but does the creation of such a category actually benefit workers if it means that there end up being fewer full-time workers and large numbers of people end up losing their benefits? If this is the case, and it's likely to be, then it's rational that anyone who is an employee would fight such a change. That's why I oppose it.