Subjective leading statements aside: Every President is a temporary spokesperson for the ruling class. Choose your flavor, it matters less that the political rhetoric suggests during election season. That's largely a psyop.
If anything, Trump's conviction shows just how badly you have to mess up to face legal consequences as a former US president. It also raises a lot of questions about how a former president can even be convicted. By law, they must have Secret Service accompaniment everywhere they go. Does this include jail? Who knows—it's mostly uncharted territory.
This doesn't mean a former president can't or shouldn't be held accountable for crimes, or that they are somehow above the law. However, conversely, the Kennedy assassination underscores the potential consequences of a President defying orders.
The fact that other politicians have gotten away with crimes or haven't been caught doesn't make them immune to prosecution. The Presidential office is supposed to be a representation of the people. If it is not, we have the constitutional right to remove them from office and/or hold them accountable for any crimes against humanity.
Trump committed the crime. He is a convicted felon. Period. This isn't his first run-in with the law. Trump has a long history of criminal activity before, during, and after his presidency.
Trump is the only former US President to be impeached twice and become a convicted felon. This sets an important precedent.
He also will have his days in court for the three other ongoing criminal trials he faces. This is just the beginning. He thought he was above the law. He is not.