My initial training was on a traditional pg wing but my ongoing learning (Because learning always continues) is on my first wing, which is a reflex. I had the same questions and now finally see it like this: (I'm not an instructor, this is my own interpretation. Take it as you will & I'm happy to be corrected on any of it...continuous learning )
1. Neither every traditional pg or every reflex is safer, it depends on the EN/DHV rating of the individual wing. Some reflex wings are EN-B, whereas some traditional wings are EN-D, while some traditional wings are nice and safe at EN-A.
2. The above notwithstanding, reflex wings are generally more resistant to tucking, because of the aerodynamic damping effect on pitch movements caused by a raised leading edge (It's harder for the wing to nose down). BUT ONLY IF THE REFLEX IS BEING USED ie. Trims open.
3. Because it requires a more extreme situation to tuck a reflex wing with trims open, the forces involved will be by default larger and the resultant incident will be more extreme, dynamic, disorienting etc. if your reflex wing does have a frontal.
So what does this mean for me (And possibly you) -
My wing (Dudek Synthesis LT) is rated EN-C. Unless I'm mistaken or the situation has changed, reflex wings are rated with trims closed (Non-Reflex mode). So, when I take off on an average day with trims closed and little/no reflex in the wing I am flying an EN-C. I don't particularly like this, but it is what it is. As soon as I can, I open the trimmers and the wing becomes more resistant to pitching movements and frontal collapse. The trimmers open also give me better cruising performance. So in my case, I am sacrificing the potential safety of an EN-A or EN-B wing, for the performance of having reflex in flight. My wing can be flown unpowered aswell, but I won't do that because I don't want to fly an EN-C unpowered. The unfortunate reality is that while opening the trims makes my EN-C wing safer, I usually need to have them closed during the most dangerous part of the flight - landing & taking off.
Also, having trimmers is one more thing to remember & worry about when flying, and to remember when landing/taking off or if you get an engine out (My trims are a PITA to close in a hurry for landing )
I wouldn't go back to non-reflex, but I wouldn't condone doing initial training on one. Why? Because initially when learning you wont be using the trimmers anyway, so why with zero experience would anyone want to do repeated low altitude circuits, landings & takeoffs on an EN-C to learn, instead of a forgiving EN-A. I think everyone's initial training should always be on a low end EN-A designed for training. But I'm NOT an instructor, so I could be wrong & I'm sure many would disagree.
You can get EN-B reflex wings, but whichever reflex you get, just keep in mind that its safety as per the rating is with the reflex off , with the reflex on its resistance to tucking will increase. But if you get into big air & it does tuck in reflex mode, you want to have the experience & cool head to deal with a very extreme situation. I don't yet, so I avoid any questionable conditions.
It's usually recommended to use active flying with reflex off in turbulence in case you hit an unexpected invisible monster. But in my case with reflex off its EN-C & I'm fecked anyway, so I just carefully manage the days & conditions I choose to fly in. Fingers crossed!