Alright, bud, time for a history lesson.

Strategic bombing, as a concept, relies on throwing massive numbers of explosives at enemy production in an effort to disrupt it. During World War 2, Britain found itself on the receiving end of German strategic bombing, targeting its big, centralized plane factories. So what did they do? Instead of offering up a few big, juicy targets that the Germans could throw a large percentage of their bombs at, they instead spread out their factories to a bunch of towns all across the country, each producing some component of a plane. That way, when the German bombers came a-knocking, they had to pick between spreading out there bombs across a large number of targets, likely doing very little damage to each (due to innacuracy and not knowing exactly where they were), or focusing on a few factories and only very lightly disrupting production. Either way, they got less value.

This concept of dispersed industry is still in use today by Ukraine, because just like London's was 80 years ago, Kyiv's air defense is not invincible. If you throw enough drones at it, some will get through. The key is, because Ukraine's infrastructure is dispersed - because they don't have just one big factory - there isn't a good target for russian drones that get through. Maybe, with the 1% or 5% of drones/missiles that get through, they'll hit a small manufacturing plant and lightly disrupt Ukraine's production. But that's ultimately a small loss, and what's much more common is russian drones missing their targets and hitting civilian infrastructure, houses, or fields, which while still disruptive, is not particularly disruptive to Ukraine's war economy.

That's why factories get spread out. It's a lose-lose for anyone attacking them, forcing them to play whack-a-mole with infrastructure that can easily be rebuilt, and causing them to waste massive amounts of explosives and money on systems that ultimately achieve fairly little.