Why is my stucco cracking?
The cracking is only a symptom. The symptom has previously been treated by covering with paint. Your proposed solution is simply another form of symptom treatment. The cracking will return, probably in the same time frame.

The underlying issues is what needs to be addressed to make the symptom go away. The issue is the soil under your foundation, either it is settling or you are on expansive soils

We don't have enough information to determine the source of the issue here now. I suggest getting a professional out to evaluate the situation to see if it is something that can be addressed in your budget. Otherwise, just continue covering the cracking with paint.