The bridge isn’t the only way you can use Daz content in Unity — your other option is to purchase Daz items that have Unity file formats, download the manual files and upload them directly into Unity. Select items in the store also include Unity files, which can be either added directly or converted for use in your software of choice. Otherwise, you can export certain content out of Studio as .obj or .fbx files for use in third party software.
Studio can also natively export .obj and .fbx files, which Unity imports. Rigs and Textures. Daz Materials may not transfer with fidelity using these file methods, but the skeletal mesh is well supported. For supporting textures, the bridge is the optimal method.