I don't compete often, and I'm not cutting weight or changing up my life or training schedule when I do, so I have a very different view on the issue of S&C than some one who is more competition focused.
For me, it all comes down to being healthier, better equipped (both mentally and physically) to enjoy and thrive in life. So, strength and conditioning work is hugely important to me. I work out 6 times a week, and roll with the local club 3-4 times a week (usually right after a lifting session in place of the conditioning segment).
I would no more give up lifting big weights than I would my mat time or range time. These are not competition tools to me, but integral parts of my life.
I'm 27 years into my martial arts journey and 37 years into my life journey, and even though the two started at different times, I don't plan to end one until the other one is done.
Plus, as Jim Wendler says: "Stronger people are harder to kill."