The idea isn't to keep any specific individual's posts near the top of the "What's new" all the time, but to give members with threads that may have been forgotten about a chance to revive them while also keeping the quality of the thread high. Members want their content visible, but sites like this need the content on those posts to be worth reading, and especially worth indexing in the search engines. Having multiple 1-4 word posts in a row, that all say basically the same thing, doesn't help sites like this much in that regard.
Important to note that the bump tool doesn't just bump threads up on the What's new page, but also on the forum listing page. On your main topic, for example, you're still sitting on the first page. So, if someone goes to the "Baseball group break" forum, yours is definitely one that they'll see.
Also keep in mind that, for every bump on the site, that's one more person's thread moving down the list. Especially once the site is a lot busier, with a lot more active members, having a shorter bump time will be even more chaotic. On super busy sites, if they allowed bumps just every 24 hours, it could lead to hundreds of bumps per day, meaning an actual thread that's getting replied to could keep getting pushed down the list all day long by threads that might not have had a reply for multiple days.
I think it's a lot more important to be strategic with the time of the bumps, rather than the frequency of the bumps.
