Yep, beating that 52.4% is the key to winning. The more you do it, the more you win. Volume also plays a big role, as huge volume at 54% will be more successful than small volume at 56% (if you're using proper money management).
I was listening to an interesting podcast earlier this week from the late GroovinMahoovin talking about being a successful bettor. He said that starting out, way too many people focus on how to "handicap" (and how to pick winners). In actuality, the most important thing to learn is how to "bet"...when to buy points (answer for most will be NEVER), when to play parlays (also pretty much NEVER), how to line shop, how to exploit bonuses, how to chase steam/follow winning bettors/groups, not to hedge, how to use teasers, money management, etc. (and the one that I'd add for 2024...don't cash out bets if the house allows it).