The frequency with which ~1 extra stop of sensor DR makes a meaningful difference in output is very low.
The frequency with which the molehill of that 1-stop difference becomes a mountain on the Internet is very high.
The difference between 5DIV and PR is about 2 stops, if I get it right. The frequency with which it'll make a meaningful difference in output hugely depends on your individual typical shooting scenarios. I'm scratching the limits of my 5DIV quite often. That's me and i don't claim everyone needs a huge DR. But claiming that low DR is fine and even makes you a better photographer also sounds strange to me.