I choose to wear all the gear, but it is my choice.
I just purchased a mesh jacket as my leather jacket was just too hot at 35 C+, but I wasn't going to ride without something. It is NOT as good as all leather, but it at least has some padding and abrasion resistance in some of the right areas.
My choice is driven from my years of riding dirt bikes. Every time I got hurt, it was from my choice NOT to wear a specific piece of PPE. My personal experiences slowly led me to add proper gear to my routine. I have still hurt myself even with gear, but more often than not, I have gotten up from a small fall (even over the Salmo/Creston in the snow!) with some marks on the gear and maybe a bruise on the skin, but all the better for it.
Just like seat belts, hard hats, safety glasses, respirators, steel toed boots, etc. I feel they have their place. If you work for me, I DO get to set the rules and tell you that you MUST wear them, but I'd rather convince you to make the choice on your own.
On your own time, my responsibility is to ensure you understand that the right PPE may help you, should a bad incident happen. Yup, more training and experience is better still, but all I can do is recommend. Once you have the information, YOU get to make the choice.