Anyone ever get sick of being their own science experiment?????

I know we are all different and what works for one etc and all that, when I got bc 1 I did all the good things, exercised, ate well, cut out the stress, read that as dumped the ex and moved to WA, took my tamoxifen religiously, no missed days no holidays, guess what, it metastatised anyway after 4 yrs so I was a healthy no stressed person who got it anyway, my point is all we can do is what we feel is right for ourselves the rest is up to our genes or fate or maybe I pissed the god of cancer off, who the heck knows.