Evidently, you've directed this thread at my comment that Tomlin botched another challenge (although this was my only criticism of the man after the KC game, and in fact I credited him on several other points).
While it MAY (and I use that term, because according to pro-football-reference.com, a much more respected source than some random gambling site, he's at 52%, not 54.5) be true that Tomlin's career challenge numbers are a whopping couple of percentage points higher than guys like McCarthy, Coughlin, and others, it really doesn't tell the story of WHICH plays he tends to challenge, or WHEN he decides to throw the flag.
A prime example would be his last challenge before the Kelce play, in the Jets game. He challenges a 7 yard gain by the Jets on 3rd-and-15, and loses their second timeout when the play is upheld. Either way, New York is going to have to punt the ball back to the Steelers with plenty of time before the half, so it made no sense at all. Or here's one that counted as a "win": A couple of years ago, he challenges a 2 yard gain on 2nd-and-2 by the Bengals early in the third quarter, and it's overturned to a 3rd-and-inches. Is that the kind of play that really needs to be reversed? A simple QB sneak still nets the first down there 95+% of the time. Then Hampton of course jumped offsides on the next play anyway, no doubt trying to blow up the impending sneak. Then there's the instances when he didn't throw the flag when he should have...obviously there's no way to incorporate those into challenge stats.
So while his success rate might impress some people like you, it certainly isn't the be-all end-all myth-buster you're claiming it to be.