While signing Bieber does come with some risk due to his injury history, he is also a former Cy Young winner and could easily return to the pitcher he once was if he ends up properly recovering from his Tommy John Surgery.
Bieber will also only likely be ready at the midway point of the 2025 season which is why he will likely not be able to land a monster deal but the reward of signing him seems to outweigh the risk since he can be an incredible pitcher when healthy. Additionally, the risk is not too high since Bieber will not be attracting major long term offers due to his injury history.