It is no secret that tech companies often provide work visa, but not so much in the other fields. I think the article is only comparing DS/SWE vs actuarial science.
The article implies that AS is getting less popularity by showing how less candidates are taking Exam P/FM over time. It can also be compounded by the fact that insurance companies rarely provide visas. It does not surprise me since SOA has decided to water down their exams to attract students, so this article is just backing up the trend we are seeing - SOA is losing candidates over time, a recent surge in DS talk, etc.