Probably not worth it if you're only visiting one city as the pass is quite expensive. There are regional tourist passes though.
Hell, there are even people paying the equivalent of 100 USD just to have someone pick them up from the Haneda airport and accompany them to the hotel. Not even a taxi service, just to be with them to buy them the train tickets, etc.
Apple has the margins to just pay the license fee for every iPhone, Android makers try to keep their costs down more.
The UK is completely chaotic ticket-wise on a national level, though.
You can get a normal Suica just about anywhere.
Little over a decade ago I did exactly the same. I ended up buying a Suica card at Ueno station from a clerk, which was a bit of an adventure since she was eager to help but barely spoke any English and I barely spoke any Japanese. Together we skillfully massacred both languages with an ad-hoc pidgin and lots of gesturing. Due to an issue with my wireless hotspot I only had an old school phrasebook at my disposal, which was about as helpful as the infamous Monty Python sketch implies. The airport seemed much more convenient as a tourist since everyone there at the very least spoke basic English. At the time it was certainly possible to get a Suica card at a major train station, though admittedly not easy.
While we got ours at the Osaka airport (KIX), I am sure I saw the "purchase a new SUICA/ICOCA" options at a few terminals while topping up. I suppose you mixed up the "Welcome to SUICA" tourist card (available at fewer locations) with the normal one? I was under the impression there was a lot of confusing information floating around online.
But I agree, public transport in London is - as a tourist - more straight forward. Just a matter of spotting the terminals at some stations IIRC. OTOH in Japan we found no station with an elevator smelling like someone used a hippie bus as an emergency toilet ;-)
Quite likely.