One of the biggest benefits a small-market club like the Cincinnati Reds can enjoy is stability. Stability in knowing who you are paying, and for how much. Stability in knowing what you can expect from a player year in and year out. Having that sets you up for success because your budget isn't completely subject to the whims of the market.
So when you have built a budding young core, and you lock the key cogs up long-term, you know how much you'll be playing them every season without having to worry about arbitration swings, and you'll be less likely to take big swings on mid-market players like Jeimer Candelario and risk it all blowing up in your face.