The Trouble with Physics does address zero-point energy as a possible explanation/alternative for dark energy. Your points 1 and 2 are correct. The problem is that the cosmological constant calculated from vacuum energy is many orders of magnitude greater than the observed cosmological constant.
The Trouble with Physics does address zero-point energy as a possible explanation/alternative for dark energy. Your points 1 and 2 are correct. The problem is that the cosmological constant calculated from vacuum energy is many orders of magnitude greater than the observed cosmological constant.
FYI dark energy probably doesn’t exist and therefore doesn’t need an explanation: https://phys.org/news/2020-01-evidence-key-assumption-discovery-dark.html