Thanks for creating this.
To start with, we do not need to know what modular forms or elliptic curves are in too much detail.
Just imagine them as areas of study in number theory.
Completely different areas.
Completely unrelated.
To solve Fermat's Last Theorem, it was necessary to prove they were identical objects.
Let that sink in.
The language of mathematics was so utterly unfit for purpose, that two identical or equivalent objects did not appear to be so.
Fundamental problem?