Because the right of the past few decades has grown increasingly out-of-touch with reality. They not only deny science, they see major problems that don't exist. Look at the defense spending, it's completely out-of-control, even though there is little evidence that it makes the U.S. any safer. We spent 2+ TRILLION DOLLARS on the Iraq War. What did we get out of it? More than 100,000 dead and an unstable Middle East that has become a breeding ground for extremists.
Remember when the right told us about the runaway inflation that was going to result from the actions that the Fed and Congress took to combat the Great Recession? Never happened. After the economy began improving the deficits started going down, until Trump came in. Now we're going to have a TRILLION DOLLAR deficit this year, when the economy is booming! That makes no sense whatsoever, you should pay down debt during boom times. When the next recession happens there will be no room for financial stimulus.
The flow of immigrants into the U.S. is much smaller than it was a couple of decades ago, while many U.S. industries are short of workers.
The right is so in love with their rhetoric that they never consider whether it's based in reality or not.