Is `the guy` walking around with a sign on his chest that reads, "Just had heart surgery. Please don`t taser me if I act like an asshole."?
Do you really want officers hesitating in a situation where they might NEED to use excessive force? If so, I would suggest that you read this current thread
https://terb.cc/vbulletin/showthread.php?t=200375 and then look a bit further into that story, where the suspect was acting completely normal and then just snapped.
It may seem to some that they use excessive force at will, but they go through extensive training that teaches them when to use force and how much to apply. There are many times that we only catch the tail end of a situation where it looks like someone is being taken down hard, but did we miss the part 1 minute earlier where the cop (or someone else) was threatened?