I think everyone should have genetic testing. It determines the best course of treatment, it gives potentially gives information to descendants.
Why not have it?
I gather that my CEA is tested along with everything else before I have my infusions, but they don't bother to tell me what it is because my tumor didn't express it. At surgery, it was 3. A while ago I happened to find out it was 6.
Age is an individual thing. As a physician friend of mine says, there are the "young old" and the "old old." My mother is 95, lives alone in her house, does everything herself except mowing and plowing, reads The Economist and the Wall Street Journal as well as many novels, drives (safely), and occasionally babysits some of her great grandchildren.
The surgeon does indeed sound like a jackass. Luckily, your father will probably not have to have anything further to do with him.
F, 64 at DX CRC Stage IV (or "3 1/2" per Dana Farber consult, LOL)
3/17/18 blockage, emergency surgery, r hemicolectomy
11 of 25 nodes
5 of 5 mesentery nodes, matted
0.5 cm sub-capsular liver met removed
pT3 pN2b pM1
Neg CEA, neg BRAF, KRAS G12D, germline mut ATM
dMMR, MSI-H, Neg for Lynch
5/4/18 FOLFOX started
Added Neulasta 6/28/18
7/9/18 CT scans show no masses or enlarged nodes, 2mm indeterminate lung nodule