I probably should have explained why I consider the single-action, striker-fired pistol unsafe to carry with a chambered round. Sorry!
Here's my thought process: If a round is chambered, the mainspring is compressed, the striker held rearward by the sear.
Now, the striker is within the slide; the sear is frame-mounted. There is naturally some slight "play" between the slide and the frame (otherwise, the pressure from a fired round wouldn't reciprocate the slide). Also, the sear/striker contact points are pretty small pieces of metal.
Within manufacturing specs, no problem! I still have my father's old FN Model 1910 (7.65 mm / .32ACP) that he "picked up" in Europe while enjoying a federally-funded vacation during WWII . . .

It's never malfunctioned, and I can tell you a pretty funny story that absolutely demonstrates its feeding reliability (but that's another story).
However, metal wears, and sometimes it fatigues.

The thought of a worn or aged pistol, with perhaps an increased amount of "play" between frame & slide, and/or aged/fatigued contact points between sear & striker gives me pause. I am really not comfortable with the cocked striker over a live primer! The fear of an unintentional discharge, without the trigger even being touched, is just too much.
I have no hesitation carrying my BHP or my 1911 in Condition 1, but both of these are full-sized, robust service pistols, with frame-mounted hammers.
That said, as a fun gun for the range, the ol' M1910 is great! Even with the minimal sights (designed more for "snag-free" than for "see-me"), it's significantly more accurate than my P32. If you want the pistol for either a range plinker or for a collection (I don't see nearly as many 1910s on dealers' shelves as I do Walthers), there's nothing wrong with the 1910.
As a CCW, though, neither it nor the Walther PPK would be my choice (I'd select the Walther over the Browning, though). There are far too many better options available, today (Kahr, Rohrbaugh, NAA Guardian, etc., depending on my specific criteria and size limits).