Despite being lambasted and chastised for my opinions concerning strikers I fully agree which is why I no longer own any. Let me be clear, I don't have as much a problem with strikers that have a back up external safety, it's the ones that don't I take issue with.
What concerns me most with these pistols is how they will hold up down the road, years and decades later after use and abuse. All you have there is a little piece of metal holding back that hammer. Like all mechanical devices, things wear out over time and what's to say that a hard enough bump or jar won't set that thing off some day and Murphy says these things tend to happen at the worst possible moments. With an external safety you at least have a secondary back up in case the primary fails. If you don't like the safety, don't use it, I don't see why it's a big deal. Nobody questions why long guns have safeties so why is it such a problem with semi-autos?
While I don't have any statistics to back me up I've no doubt that a majority of accidental and negligent discharges involving injury and death happen with these type of pistols. You can counter that argument by saying "yeah, but that's because they are the most popular and best selling pistols so of course there will be more accidental shootings with them" but that doesn't change the fact that there are simply more safer designs out there. Replace all those strikers with DA/SA semi-autos or revolvers and I'll bet many of those accidents would not have happened.
I believe the DA/SA to be the safest platform in a semi-auto available and if I were to carry a semi-auto these would be it. I am not alone in my sentiments as I've noticed that some knowledgeable experts in the field are beginning to return to these type of pistols. These usually have a safety/decocker or both and can be carried in multiple ways including hammer down so there is no possibly of that hammer ever slipping over time. Like a DAO revolver, it's heavier trigger pull acts as a safety itself and if you want to be even more safe you can activate the external safety. You can rest your thumb over the hammer on holstering and if you feel that hammer come back at all you know there's a problem and you can stop, not so with a striker sans external safety and people have shot themselves upon holstering these guns as this poor fellow carrying a Glock via appendix carry found out:
VIDEO: Holstered Pistol Discharges... Negligent or Accident? - The Truth About Guns