I wouldn't say "need". European honey bees are a foreign invasive species. They displace the native pollinators. IMO hobbyists are worse because they are damaging the native bees without reason unlike industrial farmers that need the bees to produce the food we all eat.

And the reality is the vast majority of hobbiest bee keepers do it as a tax dodge. In most states, if you put a hive on your yard, you get to classify your house as a farm and pay virtually no property taxes.