That's a very fair question and that other posters might be able to make a better case, but here's why Kiner-Falefa seems to be a target:
(1) Salary Cost: He is within a price range that the Brewers seem to make free agent signings at.
(2) Availability: During the last trade deadline time period, he was on the Pittsburgh roster, a team that was definitely a seller in 2025 and probably should have sold more. Additionally, there weren't any real great shortstop candidates in the 2025 trade market
(3) Versatility: He is capable of being a starting shortstop but is probably more of a utility player. When thinking of the holes on the Brewers roster midseason in 2025, that seemed to be the issue: trying to upgrade from Ortiz–potentially also from Durbin–in the starting lineup, while also being a capable bench player if he was taking Monasterio's spot on the roster.
(4) Potential Contract Length: He has been playing on shorter contracts. He was signed for 2 years/$15 million in Pittsburgh. If he were signed to a similar deal for 2026 & 2027, that wouldn't block the Brewers elite prospects at shortstop (Pratt, Made, Peña) coming through the system.
So I don't think there's a clamoring for Kiner-Falefa among posters, other than looking for the least rotten apple towards the bottom of the barrel.
Kim would be a better signing, but would he sign for what the Brewers might pay for a free agent?