In-Game Parser.

[Wildsprite]

Have fun doing Odin with people who can't meet the check because they want to "play their way" or people not meeting T8's check without full Echo.

I know pleanty of players who beat the DPS checks on things without parsers. want to know how? simply going in and learning what happens when.
your agrument is invalid.

It's possible to beat content without a parser, but it's putting self-imposed limits on yourself (and others) that don't need to be there. You don't need a speedometer in your car to know you're going too fast, or too slow on the freeway. Enjoy that speeding ticket though, when you thought you were doing okay, but didn't have an exact readout on your speed.

The same exact logic applies to end-game content. You don't need the meter there to have a general idea of if you're doing good or not. But having a parse on hand, while you're fighting, helps you make the necessary adjustments (using poison pots, or saving them if your raid DPS isn't on track) to actually beat a boss, instead of wipe to it. Do you get the point?

this is a game, the devs expect it to be played a certain way.
comparing this to driving a car is not a good argument. it is not legal to drive a car that has no spedometer in it for one thing. try again with something that might actually convince the devs of your argument because I assure you your comparison to a car most definitely will not.