Having parser midfight is useful to know if you are meeting DPS expectations. Sometime, risks must be taken in order to defeat a monster within the timelimit (or pass a DPS check). So even in foreground, a parser helps to know if you should adjust your playstyle and be more aggressive to catch-up on DPS or instead, relax on DPS, focus on survivability because DPS is high enough.

Taking risks is always better than a complete wipe/timeout because of lack of DPS And overDPS'ing while taking unnecessary risks is counterproductive as well.

If someone feel pressured just because he doesn't top the chart, there is an issue with that person or that person environment (peer pressure).