Quoting this from the article: It had been hoped that Higgins' problem could have been dealt with less invasive surgery, but after deep consultation, medicos agreed on a more serious procedure.
You would expect Higgo and family to make the decision not the medicos. I've seen this stuff many times before and all to bad outcomes.
The medicos would have explained the options - option 1, less invasive, option 2, go in harder if option 1 doesn't work. If he needs it done then he needs it done. I'd imagine that would have been explained to Jack and his family and they would of course approve of surgery to address this potentially life threatening condition.