Although, regarding people only using it as a DPS meter, that's right, some will just use it for that sole purpose.
And honestly, I don't find it that bad. They can use it as a tool to improve. Imagine you just clear Shinryu ex, and happened to be parsing the fight. You barely killed in time, but managed. Now you get into farm groups, and this time the group is competent, but there is a tiny bit less dps than the time where you killed it and end up wiping. The parse will show you that, on average the group lacked x amount of Dps, and you can also see who is under-performing, and try to help those person.