Economic health in general? GDP misses some important details, but it's a much better measure than simply looking at the share prices (not even the market caps) of a small selection of companies operating in a specific sliver of the economy that was very important 100 years ago, but represents a declining fraction of overall US productivity.
Median wages, labor participation rates, access to education and health care, etc... are all more interesting measures. If the economy is only working well for the top 20%, then it's not a very good economy no matter what the GDP and stock market says.
