Eh, I'm a PC gamer primarily, so this has just been something I've been use to for like...a decade now I think lol I don't think it's really THAT huge of an issue, but it definitely sucks to have that option removed for those that want it, it's not like the consoles are NOW going all digital, so unless it's like a smallscale indy game, I'm not sure there's a good reason to not have a physical edition of a console game from bigger studios. Yakuza as a Japanese series (I still just call it Yakuza lol), just seems like one of those games that is likely to have an audience that wants physical editions, like those who collect JRPG's and such and want a nice display, especially for an ongoing series.
I don't think it does anything to hurt the series, most people are probably buying digital as it is, or playing the game on Game Pass, it's the inevitable future and it only really bothers collectors and probably more old school gamers than it does the current younger audience or people who are okay with digital. I'll still pay full price for the games I really want digital or I wait for deep cut sales, just depends on the game. Even if something happened and I lose that game for whatever reason, it's not like I didn't get my money's worth out of it.
That isn't to say I don't also buy physical, I primarily do physical for console, because there are games I want to physically have on my shelf, or I buy them because I know I'm only going to play them once, like the God of War series, Last of Us, Uncharted, Horizon, etc, and then go trade them in and put it towards either a new big game or one I might keep. If things go all digital for consoles, even the big games, I'm not sure if I'm going to be as likely to play those ones at launch. It's not that I'm not going to enjoy them the same, but these days if I'm buying stuff, I want to feel like I'm gonna return to it at some point perhaps and I never really do for those games usually.