Transformers isolate the load completely from the primary power source. Does that mean that I can connect two or more transformers one after the other and expect my Linear Power Supply to have better safety than having the isolation of one transformer?

For example, lets assume I need 12V AC out. The situation I am trying to imagine here is having 230V/50V and 50V/12V transformers.

Would this make my system more immune to lightning?

Are there better ways of doing the same?