That's the precedent being set by Pelosi by limiting impeachment.
In some ways Trump shaking down everybody to stay in his stupid hotels seems like the most inconsequential of his crimeing, but it's also one that's clearly in the constitution. In addition, while the US has all kinds of corruption in politics, the simple "put a big sack of money on the desk" kind has arguably not been so dominant, at least in federal politics. Leaving that door open is... a problem.
