This is, in fact, still worth doing, for reasons I shall enlarge on below. To do it remotely, an air assault has to be launched, with precision-guided munitions targeted on the plane. There are a number of problems with this. First, the plane needs to be located. From the news we are getting, it seems that we know pretty well where it is, and a plane the size of a large commercial passenger jet is not an easy thing to move around.
Military people can be very ingenious, though.
A basic part of advanced military training consists of presenting the soldier with large, cumbersome objects that need to be moved or hidden. Fighter-bomber planes travel very fast, and have precious little time to scrutinize their targets. A mockup doesn't have to be correct down to the last rivet. Second, you have to get attack planes to Hainan Island and back. Unless, by sheer good luck, a suitable force is close by, these both present obvious problems, of the military and diplomatic sort.