There were no significant threats in the West before corona to justify high level of hygiene. How many people does the average person know who died of something preventable with good hygiene?
Secondly, increased hygiene has it's own set of problems. You dont kill just corona, you also kill the countless harmless pathogens, but who are important to keep your immune system on its toes. Its suspected that the reason there are so many allergic persons in the West lately it's the increasingly sanitized world around us.