no, not necessarily
Similar happens in real life
Sure there could be a bit of tweaking, that and less altering of FoV on players' part... but aircraft can be lost in an instant, if looked away from in real life, as much as aircraft can be difficult to spot in real life (yes, even big white commercial aircraft), even if the looker knows where to look
let's get a bit more accurate in the "can't spot the dot" cries of the protagonists
I'm all for "realism" too, but not at the expense of realism... current technology precludes "realism" on a grand scale