No, his case proves nothing of this sort. His father had the same thoughts, and when he quarreled with his son and separated from him, he requested his daughter to "lend" him her son, so that he could give him the same education as Wolfgang's and have another child prodigy [1,2]. He failed miserably...
[1] https://en.m.wikipedia.org/wiki/Maria_Anna_Mozart#Leopold's_...
[2] Solomon's biography