That's nice that you are happy with your score, but people who are anxious about the GMAT have valid reasons as well. For example, average 1st year compensation at Investment Banks hit a new high this year at around $230-270k. The proven path to one of these jobs is an MBA from a top school - preferable top 7, but anything less than top 15 and you'd need a miracle to land such a job. A key component of getting into one of these top schools is a strong GMAT score.
Degrees from top schools will also open doors to more desirable jobs, and just more job offers in general, not just upon graduation but for the rest of your career.
So, if you're not interested in making $250k when you graduate, or $1mm+ five years out, then a degree from a top school might not interest you. But most people do in fact go to business school to improve their employment prospects and to make more money. For anyone that would like to have a better job or higher pay, then the few hundred hours spent studying for the GMAT are truly insignificant compared with the benefits.
A fifty point improvement on the GMAT can mean tens of thousands more in first year pay, and hundreds of thousands or millions more over the course of a career. The GMAT is one of the few things that you have full control over if you have reached the stage of applying for business school; and it can make a spectacular different when it comes to your future. To me, it makes no sense not to put in the fullest possible effort into doing the best you can. There used to be old commercial that said "you can pay us now, or you can pay us later"; with the GMAT, you can spend 100-200 hours now, or you can spend 1000 hours every year later to make up for the difference.