I'm a retired LL--and had some older building with rather limited soundproofing.
I think it makes sense to require carpets and padding over hardwood floors--but UNLESS that is spelled out in the lease as the tenat obligation then I think its the LL;s obligation to address sound levels.
I fail to see where routine walking on creaky wood floors is the tenant problem!!
Its a difficult judgement call ( not a legal call) as to women in high heels, people of 150lb plus in boots, or a kid running a plastic play toy endlessly over woor floors.
Sure reads to me like you are not a bad apple.
This LL is going to have problems no matter who lives there as noise carries---he would be smart to get some of the higher end padding and some durable "berber" carpeting for large area rugs in hardwood areas--its suprising cheap if one shops the outlets or big box on sale--the good (not the cheap stuff) padding is waht really does the trick.
To some extent I suggest you suggest your "super" and the other tenant take it up with the owner!
I don't see the problem as your problem--but as a practical matter if you see a sale of good dense padding and some remenats you might offer to split it with LL just to buy some peace. I've seen and bought darn good quality "remnants" as large as 12 x 14 for $50 or less---sometimes cheaper to lay two layers of good carpet than a layer of padding which is rarely on such a lowball sale.
If a wood floor squeaks--not your problem--and not so easy to solve either w/o actually renailing etc.