I have had too much experience with people having suffered of strokes to believe this. I’ll buy the theory from professional doctors that it’s Parkinson’s disease, but doubt it’s strokes.
Everyone I’ve been associated with who has had a stroke they lived through, bar none, and I’ve seen a lot has had serious muscle loss, and slurring of words I don’t see with Hillary Clinton.
Strokes run the gamut from TIAs (Transient ischemic attack) with little if any noticeable deficits to strokes that are fatal within minutes. But even a TIA should be evaluated immediately by a doctor at a facility with appropriate equipment. Your acquaintances who have had strokes that didn't cause them difficulties later might not even be aware themselves that they had a stroke.