Sports betting middling: does anyone actually profit from this strategy

I’ve read a bunch of posts about middling and I’m still trying to figure out if this actually works in practice. Like, is anyone here seriously making regular profits off finding middles or is it mostly just a cool theory? Seems like between juice and the time it takes, the edge is super thin unless you’re quick with line changes.

I get that it’s satisfying to land a nice middle and I like low-stress strategies, but my gut says it’s a lot more miss than hit. Are you just burning money most of the time or is there a more calm and calculated approach that can actually work? I trust the folks here have some stories, whether good, bad, or ugly. If there’s a patient way to grind it out, I’m curious to know more.