Yes, but that is true of virtually all pitcher-batter match-ups, especially when it involves the bullpen. Example, David Ortiz vs. Mariano Rivera. They potentially faced each other for 17 years (1997-2013, but I don't know if they saw each other every year in that span, especially with Ortiz in Minnesota for the first 6). Per Rotoworld, Big Papi (along with Jason Varitek) had the most plate appearances against Rivera of any player. It was all of 31 (averaging less than 2 a year). If they NEVER saw each other the first six years, it still would average under 3 per season in Boston, and that's with playing 18-19 games a year.
Slim as the numbers are, it's the best info they have.
Leaving Barnes in was defensible. So was bringing in Kimbrel.