What it actually means is that a cheap method for killing drones isn’t far away. Including immediate real time counterbattery fire against the launchpoint.
It would be tough do develop a MANPADS that can reach the ~25,000 foot altitude of modern armed drones. But there are plenty of old vehicle-mounted Soviet systems that can. I think Armenia shot one down with an old SA-8 earlier this year.
Of course, I don’t know much about the going price of Soviet surplus SAMs these days, nor do I know much about how detectable these drones are on radar.
Counterbattery against launch site only works if the drone’s controller is actually at the launch site - larger US drones are controlled by satellite uplink to a remote facility so blowing up the launch site may not do much of anything.
Also, modern drones have limited self-directed capability in case their uplinks fail. You can already, today, buy a commercial drone that knows how to orbit an object by itself, lock its camera onto the target, do things that could be converted into missile launch events, and then fly home.
You can kill a drone with another drone