> wouldn’t be seeking to make a quick buck selling ads against deep fake videos

This isn't a money making venture for them, and you basically admitted as much. They poured no doubt massive amounts of money into developing this and have little hope of earning it back soon. This is an attempt to keep up with other ai companies also developing video models in order to not look behind to investors. Making it available to users is similarly about increasing active user counts in order to look more successful. If people incidentally get off to it that's not their concern