That's a huge amount! I didn't realize it was so much!
Residential use is 39% of all electrical generation.
So driers are 2.3%.
That number doesn't surprise me in the least. Residential electrical consumption is trivial if you don't include heating. So having an appliance use 5% of all home electricity seems pretty low?
space heating: 15.2%
water heating: 11.6%
refrigeration: 7.1%
lightning: 3.9%
television: 3.7%
computer: 2.4%
other: 40.7%
source: https://www.eia.gov/energyexplained/electricity/use-of-elect...
I heat my house so that I can run a freezer inside the heated house to lower the temperature back down to what it is outside sometimes. It's not entirely efficient.