A lot of officers treat tasers like they are magic powered. You have one chance at a good hit; and legally - preferably from behind. If a prong hits above the neck or just in a small area you’re legally and/or tactically ineffective. You’re also now within 7 to 15 feet and have the wrong weapon out and are danger close to a pumped up subject that you just tried to Tase.
Tasers can also create a Set of officers who forget their physical compliance techniques or that a baton is legally justified at times.