As I go through rewrites and greenfield projects and so forth, I begin to realize that for any particular technology you are not simply having a relationship with a static list of pros and cons, but you're also having a living relationship with the team behind the work.
In other words, a bet on TypeScript is also a bet on the TypeScript team, and in my experience the TS team is very fast at their work. This makes me more forgiving of bugs. Similarly, a bet on Terraform is also a bet on Hashicorp.
Here we have someone recommending a choice of F# over Elm because betting on the leadership is allegedly not good. This is not character assassination. The commentator is not criticizing Evan on irrelevant private affairs and by extension saying that you shouldn't use Elm. Evan has created a company and is advocating for his product; he is a public figure and is being criticized on the grounds of project management.