This movie is the epitome of 'tell, don't show.' Despite being "people-saving savants," the only time we see the immortals saving non-immortal people is the abducted children and Nile stopping a terrorist at the beginning of the movie, one of these weren't even real and was just used as a lure. Andy's supposedly had hundreds of years worth of saving people who, in turn, directly benefit humanity, all dumped on our heads in hasty exposition over an evidence board, because these characters have killed more non-immortals than saved, despite being heralded as unkillable heroes. My favorite part was when the immortal woman who can't die talks down to Merrick, being sad for his wife's passing away via Dementia, arguably one of the worst ways to die.
And the villain is just laughably cartoonish. They really took a guy whose motive was curing DEMENTIA by using the immortals and tried desperately to make him look like a maniac villain by giving him no moral qualms. The writers knew that someone making a cure for DEMENTIA, ONE OF THE WORST WAYS TO DIE, to make a profit off it isn't actually the worst thing in the world, so they had to play him up as some unethical psychopath, so the Power Rangers going "Stop trying to cure dementia!" doesn't come off as heartless, because "What a monster! He sells cancer medication!" isn't exactly a good villian selling point.
The moral of the story is that curing dementia is bad, and if your loved ones die in the most awful ways possible, watching as their very memories, psyche, and being are ripped out of them slowly until they wither away into nothing, they probably deserved it cuz you cant chose how you die ;)