That study is seriously out of date, as it addresses the optimal strategy to prioritize vaccinations when the vaccines are scarce. That's still, sadly, a major concern in many parts of the world, but not so much in the US and Europe.

Since then, there's solid science[1] that hybrid immunity is significantly better than either vaccine-induced or disease-induced. So taking the vaccine is clearly the better choice whether you've been infected or not.

[1]: https://www.science.org/doi/10.1126/science.abj2258