While this is true, these are nothing burger examples. The world will not crumble if you don't help a nice lady put her luggage in the overhead compartment.
Yes, as a man, our "strength" is mostly for show and is redundant in modern society. Also most men are not even very strong because we live sedentary lives. Because - surprise! - 99.9999% of all economic activity has nothing to do with strength.
This isn't ancient Rome and you aren't a spartan. Most men are fatties sitting at an office job. They don't have, nor need, strength. They need statins and metformin.
Almost every flight I take, a woman asks (or appreciates the offer) for me to help put her bag in the overhead compartment.
My wife appreciates that I can can carry a double stroller with the kids on it up a few steps.
The fact that you can't think of such examples might reveal more about you than about the necessity of strength in modern society.