Hi.
Well the problem with Get/Set properties is that its mirroring and there for unity build process does not know if that certain component is used.
Therefore you need to explicitly 'tell' unity to include that specific component to include in your build.
Linker wizard does that, during playmode it recognizes those actions and add it to a list file.
also Get/Set properties are slower than dedicated actions, but you wont really notice unless you use 100s at the same time.
But its best to avoid using Get/Set Properties.
They are mainly designed for use with 3rd party scripts/assets.