I regretfully agree... that as I am utterly interested in all the UFO, alien, time travel films and documentaries. I felt there was something missing in that it really disappointed me. Some things did not add up. And the person crying and shaking upon seeing a UFO... REALLY... would NEVER have scared little bitty me... where's the rationale in all this. AND likewise... they have been around for multiple millennia - if they were to take over Earth... they would certainly have done so by now!
Also "they" may even have had their home on good old Earth eons ago. They might even have been here way before us - and us - the trespassers or the univited.
Or... They have a need for this planet and it's people on it... otherwise... we would have been gotten rid of a long, long time ago. They need us for something.
Because "they" are becoming bolder and bolder, even taunting us... it's just a question of time ... before we will find out what their agenda is once and for all. Trust me. Will we be ready for it?