>>940481
It does make it blurry, well depending on the settings and the quality settings of the engine.
In UE5 subsurface scattering does overlay translucent copies of the mesh onto itself several times. This becomes noticeable on closeups, if the engine scalability settings are too low, insufficient hardware performance, etc...
Here lies the problem: It may look close to photo realistic with maxed out setting, for UE5 this means epic or cinematic but look totally different with lower settings.
The waxy look is also a common phenomena when using subsurface scattering even with production renderers where it doesn't get blurry. But it is again dependent on the number of samples the path tracer uses.
To mitigate these problems you can use a very close up low resolution test viewport set to the highest quality possible and tune the look of the material from there. Then use the same viewport with performance settings and tweak settings until it looks as close as possible to the reference and tweak accordingly.