Technology

I don't know if that's true or not -- at least some of them definitely do, but maybe some don't -- but those capabilities are cheap enough that they can afford to have them there if it's what it takes to make the drone work in the presence of electronic warfare. A dumb artillery shell in the US is, from what I can dig up, about $800. The DJI drones are rather cheaper than that.

To put it another way:

https://www.faac.com/blog/2018/01/28/killer-instinct-how-many-soldiers-actually-fired-their-weapons-in-past-wars-how-has-simulation-other-training-helped/

During World War II it was estimated that 45,000 rounds of small arms ammunition was fired to kill one enemy soldier. In Vietnam the American military establishment consumed an estimated 50,000 rounds of ammunition for every enemy killed.

https://thegunzone.com/how-much-does-5-56-nato-ammo-cost/

On average, the price of 5.56 NATO ammo ranges from $0.40 to $1.00 per round.

By comparison, the drone is probably pretty cost-effective. If having a GPS chip is important to make it usable, cost isn't going to be a barrier.