This reply kinda proves you have no idea what features fflogs actually has, and also don't take prog very seriously.
It is immensely valuable for diagnosing wipes. Being able to see what mitigation people had, being able to check how much they were overkilled by, how many heals they received leading up to wipes. This is invaluable for progression.
Here's an image that demonstrates this:
Additionally, as I have said earlier in the thread, it's useful as a tool for double checking what abilities people are using at what times, and ensuring they're being used to maximum value.
It's also valuable as a comparison tool. If I'm playing a healer and I'm unsure about what mit to use, I can literally check a bunch of logs from high ranking healers and compare what they're using, and when. Similarly as a DPS, I can check what fight specific optimisations people are using, and apply that myself. FRU had a LOT of this, so it was very useful to be able to check what the best players are doing.
If you think fflogs isn't useful for prog, you're not serious about prog.
also lol, the average PF player is
terrible at their job