Major League Baseball, for you and me, non-combatants, is entertainment. It's a thing to watch, and there's value in it being fun to watch that is mostly but not entirely captured in our favorite team winning or losing.
A team full of Mark Reynoldses would be excruciating. You can admire the honesty of three-true-outcomes baseball—and the wisdom of playing it in the current run environment—while still hoping somebody makes it less viable, in the same way you can tip your cap to Jose Molina while hoping umpires someday stop falling for the photo-realistic tunnel he keeps painting over the same brick wall.
But one Mark Reynolds sitting on the bench, waiting to give us a 1-in-20 chance of jumping up and down and yelling at the TV after the Cardinals' starter gets roughed up for four early runs, is entertaining.
I can wonder whether he'll be more valuable than Xavier Scruggs or even Tommy Pham in the same role—you can wonder about Stephen Piscotty, if you want—and I can wish for someone like Rickie Weeks, the designated longshot in the field of possible bench bats that emerged over the last week. I can (and do) think that paying list price for a fraction of a win off the bench is a strange use of resources, even if the free-agent WAR values line up.
But value is John Mozeliak's job. On that fractional-win scale I'm happy to be entertained.