Irrelevant. All med personnel involved spoke well of the husbands concern and availability at trial(s). The court oversaw the whole extended affair.
" How can any reasonable person not believe that there's even a possible conflict of interest in a case where a husband stands to gain a lot of money upon his wife's death?"
Did you read the court docs? The court took over all of it, to avoid this accusation. Read the court docs. They'll clarify things.
Would you be so kind as to supply a link to the particular document you're referring to?