This is true but it has a learning curve and you shouldn't shave your face with these unless you're willing to accept that you might accidentally get some small scars from nicks
I’ve been shaving with one for years and have never nicked myself more than I would have with a normal razor. It’s really nothing to be afraid of. The only way to really cut yourself would be to slide “with” the blade across your face, like you’re slicing. Otherwise it’s honestly harder to cut yourself compared to a cartridge razor.
I have never nicked myself with a cartridge razor whether I shave wet or dry, even with sloppy technique. I have 5 safety razors of varying design and thickness and about 100 brands of cream and blades, and I have to be careful with them or they leave gashes on my face. I have a very sharp chin with basically no body fat so that might contribute to it.
The only scar I have in my face is when my brother closed a glass door on me, and I have been shaving with a safety razor for years now. Sure, it takes a bit to get used to, but that's with anything new.
Have I nicked myself? Yes, once or twice, a few months in, when I got a bit too cavalier about shaving with it (it's still a sharp blade). But it didn't leave a scar.