This is the size of the binary or RAM usage? If the size the binary, does it matter in most cases? If the size of RAM, yeah, I can see how that seems a lot for a terminal.
The binary is statically linked and embeds several fonts for a consistent, cross-platform, out of the box experience.
The on-disk size != RAM usage, and on-disk size really doesn't matter on modern systems, unless you're on a very resource constrained system, in which case, you probably don't want a feature-heavy GUI anyway.
The on-disk size != RAM usage, and on-disk size really doesn't matter on modern systems, unless you're on a very resource constrained system, in which case, you probably don't want a feature-heavy GUI anyway.