I suspect most people understand the true benefits of it. But most people in the US and (Western) Europe have enjoyed the benefits of very stable currencies (measured in decades). Compare this to countries like Argentina which saw 26.7% inflation just last year. See the price correction happen where your grocery store suddenly jumps up the prices on your food from $10 to $12 just to account for inflation. Then wait for your paychecks to catch up. Then your employer is stuck deciding if they have to let people go (may not be simple in some countries) or desperately seek other cost savings and methods of revenue increase. This leads, potentially, to further price increases on consumer goods, requiring further pay increases to be able to maintain basic consumption, leading to more pressure on employers, etc.
Deflation has its own downward spiral once it gets past a small percentage.