Drones are not a strategic weapon. When you talk to the Ukrainian military, with their actual expertise in drone warfare, the general consensus is that drones are an inferior replacement for artillery (note that ex-Soviet military systems are a lot heavier in artillery use than NATO military systems) that they use because they can't get the artillery shells that they need but they can get drones in sufficient quantities. It hasn't enabled any strategic breakthroughs in the Russo-Ukrainian War, it is merely served to lock in the grinding stalemate it's been in since October-ish 2022.

The US war on Iran also demonstrates the problems of drones too: the US is currently able to wage a war 6000 miles away from its shores, because of the use of an awful lot of weapons systems that aren't drones. Iran is unable to dislodge that military, or even meaningfully impact its ability to carry out said war, not 100 miles away from its shores, despite a heavy use of drones to attempt to do so.

The war also demonstrates another big issue... the continued delusion of many civilian and military leaders that strategic bombing alone is sufficient to win a war despite this failing literally every single time it's been attempted in the past 100 years.