A few semi random thoughts
Plenty of 64 year olds are not frail helpless creatures and plenty of cops are not strong or fast enough to easily subdue someone.
Depending on county and agency a few paramedics can declare a 5150 status (its not a basic part of the licence, its an additional certification and depends on the specific agency that employs them, Joe Lunch-bucket street Paramedic generally cannot). Counties vary in the application of this.
If the medic has that authority he could basically tell the officers they are calling it as such but patient was unwilling to cooperate. Even if he does not, EMS types and the cops get to know each other and tend not to jerk each other around much (ignore the firefighters they love jerking everyone around :D).
If the patient became agitated or resisted in any real way the medics will back off and let the cops deal with it.
EMS personnel document many statements by patients as part of their assessment “patient complains of chest pain” “patent expressed desire to harm self” and the medical and legal world has an obligation to act on them.
In plenty of cases all anyone has is hearsay from a paramedic before the patient loses consciousness or kicks the oxygen habit entirely.
Fear of litigation works both ways, ignoring a possible cry for help looks just as bad as overreacting to a situation.
As other posters have put it, alternative headlines of “Police and paramedics ignored obvious cry for help” are not very appealing either.
Having been in the room when some messy law enforcement situations went down, I wish tasers had been available long ago. Alot of people get hurt in scuffles with law enforcement. Cops are not some kind of uber ninja who can with a flick of the wrist magically restrain anyone.
Hand to hand fighting is rarely pretty, and if you do, you have the possibility of losing your weapon. Tasers minimize the chance of having your weapon stripped in the scuffle.
Rule #1 in any emergency service agency is go home to your family at the end of your shift. If tasering is more likely to achieve that, so be it. Even the worst cop often has people at home who love them.