There's 2 sides to that coin.
A match bump is just you beating who showed up. I've known some MM ESP shooters that received a match bump at a major match only to get stomped on each week by their fellow SS ESP each week at local matches.
If you beat every MM shooter only to finish bottom of the heap in SS, then it's a hollow victory. Now if you get a bump to SS and you're beating some EX on a good day, then you know your classification is well deserved.