Can someone explain the conspiracy theory? I don't get what it implies...that twitter was overstating liberal followers but understating conservative followers

Can someone explain the conspiracy theory? I don't get what it implies...that twitter was overstating liberal followers but understating conservative followers in a way to juice liberal tweets? That thumb on the scale was then removed before Musk took over? Seems pointless and much easier to achieve through other means. Ultimately this nonsense just confirms to me that Musk is right and twitter's algorithm needs to be open source and the rules surrounding banning people need to be clear to ensure trust.