Facebook can cause a Brexit (see cambridge analytica scandal). FB (and other FAANGs) provide the data to put whistleblowers in jail. They have more money than some countries. They can put a price on your life’s information or tax almost every transaction you make in certain spheres. They can almost completely avoid paying the taxes governments impose on others. They can make you pay every month for life to hear the music of long dead composers and artists.

I agree corporations don’t claim certain rights that governments do at present - the right to kill citizens (sometimes without trial), the right to tax their income (though they do impose transaction taxes). So they are limited at present but not so much as you imply.

Information is powerful and exerts huge control over our lives.