Ditto, but almost everything I watch is one-and-done. The series that I like enough to watch more than once are few and far between...so I tend to buy those, whenever they come up in a particularly good sale. Among things I liked enough to buy, the longer it's been since I watched it last, the more likely I am to watch it in the near future. But the longer I wait, the more likely that some contract expires, and it disappears from streaming services.
Recently I picked up a couple Blu-rays with digital copies for $3 at Fry's. Vudu had one of them on a huuuuuuuge sale this weekend, digital copy only, for $5. The iTunes price is $14.99. Again, I got that $15 iTunes price... for $3 as physical copy with a digital code. And if I wanted, I could sell the disc at a resale shop and get back a buck or two. Buying video on demand online right now makes no financial sense whatsoever.
That's only if you place little or no value on convenience. I don't spend much money on video, so the occasional $10 or $20 purchase is bearable.
I don't want a physical copy and I certainly don't want to go to Fry's. For me, iTunes / Google Play / Amazon Video all make more sense.
I've actually thought about cancelling cable and buying everything on demand because I think I would save some money. We're paying more than $1000 / year for TV. That would pay for a lot of TV at $2-$3 per episode. We've never made the jump though because of live sports and the stupid blackout rules.
I place a fair amount of value on convenience, but I weight it differently than you do. Not having to worry about my player's internet connection is a big plus. Not caring where I bought the video from is also nice. I like that it's a fire-and-forget operation to convert the video into a format that works on virtually every piece of video-oriented electronics that I own.
Bonuses: I get to choose which version of a particular video that I buy (there are often several available), often receive it in multiple formats, can loan it to a friend, and local media tends to have fewer compression artifacts than streamed media.
Of course, all this only applies to things that I care enough to buy separately. I've got Netflix and Amazon. I've got a few hundred games through a combination of half a dozen services, and it's a pain figuring out which service I bought a particular game through, and all that. I'd rather go to my wallet of game DVDs and pull it out (and I do, for services like Humble Bundle and GOG, where I can download the games and put the installers on external media).
That really is the key. I get it that all those things you list go into the choices you make. I value similar things, but differently so my choices are different. There's no right or wrong.
I bet you do it too. Ever order a pizza for delivery rather than make it yourself? Or buy a book rather than borrow it from the library?
I'm a bit of a digital packrat who likes to collect media, but a large chunk of my present movie collection is stuff for my daughter who wants to rewatch the same movie constantly so purchasing content to keep is the way I go 99% of the time.
I rarely rewatch seasons after more than 5 years so streaming is usually the best/cost effective option.