No way man, there would be no reason to second guess the purchase. My reply was going off your original post regarding building the Seneca up as a rando vs. a commuter... it'll make a fine commuter but given the 30+ pound starting weight in the catalog, it would be a hefty rando bike with full racks and panniers. You could certainly outfit it with light weight components and come in under 30 for sure but doing that seems like a lighter frame would be better served so you end up with a bike in the mid-20 pound range. Either way, I dig the idea of reviving any older steel bike and enjoying the custom build... beats the recycle bin and is way cooler than some crappy Chinese Wallyworld bike!!!
I'd caution you starting down the path of justifying bikes to the misses... there's nothing but the stink eye and the dog house waiting for you if you go there!