Very rarely?
Other than Glock, most manufacturers offer them. For example, the M&P Shield:
Almost all of my holsters are friction retention only. Only exceptions are an ankle holster, a revolver holster with a traditional leather strap, and my level-3 duty holster.
Self-defense firearms very rarely have safeties. As an example, I typically conceal carry a Sig Sauer P365 with 12 rounds in the magazine and one in the chamber. That is normal. It is a striker-fired gun, so no exposed hammer. (Old 1911-style hammer-fired guns have one or more safeties because of the design.)
I would never have a self-defense firearm with a safety as releasing it could be a life and death delay.
By your logic, I guess all the 1911 folks are risking suicide. I carry and train with a hot cocked and locked 1911.
Very rarely?
Other than Glock, most manufacturers offer them. For example, the M&P Shield:
Self-defense firearms very rarely have safeties. As an example, I typically conceal >>>> funny statement. All of my firearms can be used for self defense. Including my 20 gauge bird gun. I have personal carry, concealed mostly, that have safeties. I like my 32 beretta that i carry cocked and locked. the hammer firearms i own all have a safety and de-cocker except the .32. Of the striker fired self defense firearms i own, the sw99 has a decocker. which makes the cocked firearm into a double action trigger. no safety. My Styer M40 which has a trigger safety like a glock also has a safety above the finger guard which pulls down for safe. the release is a push up to the frame releasing the safety. Although very much like a Glock. i prefer the extra safety. And the trigger is much nicer in my opinion.