Agree. Always get a second, or third opinion.
The advantage of being in a large hospital system is that you have a care team,...several doctors, nurses, therapists, pharmacists, etc. Everyone has some input, but also, a lot of questions get asked. There's a lot of critical thinking going on. So, even though the lead physician is ultimately responsible, he/she has a team around them questioning their every decision and even guiding him/her through the process.
If you are not in the hospital, but at an office, you and the physician are sort of isolated from that sort of interaction. So, yes, get another opinion.
In the doctors defense, it was the 80s. So maybe it was a little different then. A doctor would probably not do that now.