Maybe the case for older stuff, but if you're following the current season then a) it can't be done with physical and b) is probably even more hardcore because you'll probably be watching stuff that will never see the light of day physically in the West.
So I call that BS!
Followers of current seasons that are simulcast, is something I consider done by avid fans. But that does not rule out a physical relase for a later date. Sure there may be titles that falls through the cracks because they are too obscure and won't get a physical release because of that, but those two things don't go hand in hand, plenty of obscure B movies gets a physical release while they are nowhere to be found on the more popular streaming services.
You can easily be an anime fan without buying anything.
It needs to happen otherwise anime will die. MHA is doing very well not because it sells a lot of BDs. It is snobby to say oh I'm anime fan cos I buy stuff.
Sure you can be anime anime fan without buying stuff, but you still buy a subscription atleast to some anime service I take it, otherwise anime will die because people don't use enough money on it.
Sure you can be an anime fan without buying physical relases and just have a subscription to some streaming service, but that is also the cheapest kind of anime fan. I checked Chruncyhroll for fun, apprantly it's available in my country. The cost in my country is DKK 45,- that's like 5£ a month, I spend way more on anime on DVD and BD.
So I'm a snob, that's fine with me. Even though I'm a snob, I do have my limits. I did not buy the LOTGH LE from Sentai. If 800$ was a grab in the pocket for me, I would would have bought it, but it's not, far from it, I'm still hoping for a regular release though.
But sure the streaming services are making money otherwise they wouldn't be there, it's a business afterall, just like physical releases make money. There will always be people like you and snobs like me. Combined we make it work, we get anime and the big wigs gets a big fat pay check.