Because they will continue to block any further economic improvements: regulations, balanced budget, tariffs (necessary evil right now as domestic production ramps up) and mid-income tax cuts to offset the price increase from tariff'. It's tough to compare the two: Obama was dealing with a subprime crisis where the fed artificially kept rates low, and corporations were being bailed out, so there was no real risk to them in a way. That's why all of our 401' snapped back in 2010. The economy is very healthy , too healthy in the eyes of the fed, and are raising rates even though CPI shows no signs of inflation on the horizon. The recent market selloff is showing confidence is not fully there yet. Fed should wait until Q2 2019 to raise, after the capital expenditures are off the balance sheets.
https://youtu.be/LL-XB7rw4OM