You and Alan both are trying too hard with the Biden is senile angle. It's like people who look for ways to make their videos go viral, you just can't force it. It's just not plausible to hold this view, and it's even less plausible to think you'll convince others of it. It's very close to "what aboutism" on my part, but to believe this about Biden while letting hundreds of Trump incoherencies fly by without similar comment is pretty close to trolling.
As for no one caring about the various secretaries, that's probably true of the average political bar talk. If their names are not in the news associated with some sexting scandal then of course no one is going to know who they are let along care much about them. That does NOT mean that they are not important, it's just means that the average joe has a spectacularly unsophisticated view of how a country runs. There are a million little things that need to be done every day to make society work, the fact that most people don't know or understand what those are is not new.
You make reasonable points. The fact is we could get rid of Transportation, Education, and a load of other departments of the government and never miss them. We should also stop spending money on a lot of them and save the taxpayers money. Most of these things are handled better by the states and localities.
For example, does your local school board need to check with the federal government? What do we need a Secretary of Education? Can't your state and county local school boards handle it? They seem to be already. 60% of my property taxes go for local education. Who needs the feds butting in? What do bureaucrats who know nothing about me and my neighbors are about the education and how we get it? It's all politics.
What about HUD Housing and Urban Development? All these departments are just places to award contributors and give jobs away to politicians' supporters after the election. They're a waste of money for the most part. Plus they're unconstitutional. There's nothing in it that gives the federal government the power to get involved with these things. The constitution left it to the states to handle them and regulate them, not Washington. But the Supreme Court has allowed Washington's power to grow until the huge and expensive monster it's become.