I lived in a house for 19 years with a vacant house right next to it for all but the last four months we were there. The owner didn’t neglect it, he’d mow the yard, fix it up, put in on the market from time to time, but he wanted too much money for it. Anyway, he would clear the snow, but he wasn’t very quick about it, so I’d usually do his sidewalk - just like you said, no reason to make it harder on people walking, and since I was out anyway, it was no big deal.
I also never used a snowblower - I had a thing called a Snow Wolf, a big scoop on a long metal bar with a huge wheel in the middle. It was a great lever to push and then toss the snow out of the way. I could clear my driveway and sidewalk in hardly any longer than it would take a snowblower (plus no gas, spark plugs, or snow packed augers to deal with). I used that sucker for over 15 years, getting replacement scoops and other parts occasionally. Unfortunately I think the company stopped making them sometime after 2010 or so …