Well, yeah. That's like arguing that your robotic vacuum at home lacks speed and payload capacity for repurposing to be an indoors death drone. It's a peacetime design.
If that was the only way for drones to navigate, if there were no GPS-denied methods that exploit vision, ultrasound, or a bunch of other means, you'd be right. They do the displays that way because it works and it is too cheap & easy.
Ok yes… we used more complicated self contained forms of navigation in the Tomahawk cruise missile as well. My father in law started his career in the Air Force doing radar navigation as an entire occupational speciality, so we’re aware those forms of guidance exist.
The point is you don’t get to have it both ways. Either you build a device for all contingencies which inevitably grows in exponential cost spirals, or you get cheap democratization of basic advanced precision targeting but only 1 or 2 levels deep in the obstacles it can solve for and be effective.
You don’t get to do both. You can’t build a 90 dollar cardboard and 3D printed weapon for a 22 year old to lob across a tench line, that can also solve for all the possible trons and HPM environments, fly with no link, and go hundreds of miles to where it’s needed. You damn sure done get the fully autonomous Hk terminators the people saying they are the future are promising. Telling us you can build a smarter sexier JASSM that does its own thinking is great, but you aren’t doing it for tens of dollars. Likewise, things like the lasso replaced the Javelin… and to a small extent the 81 and 120 mortars. It didn’t suddenly make artillery or armor obsolete.