Strength gives you options even on days you never need to use it.

Capability you never use is not wasted. It changes what you are willing to say yes to, how you handle an unexpected demand, how you feel walking somewhere unfamiliar, how you recover from illness. Most of the value of being strong is held in reserve and expressed as the absence of limitation rather than as any particular feat.

Stop measuring your training by whether you needed it this week. Measure it by the range of things that stay available to you. Options are the point, not performance.