Maybe late to the game (no pun! :)) but ok.
I must say that my last console was a PS3, then I played on steam 2 or 3 times a year, now I was lend a PS4 by a friend cause I wanted to try some exclusivity but is it normal to install 20-30GB even when you own physical game ?
It was already a thing annoying back in the day on PS3 for some game (GTA 5 being the worst as far as remember) but here, it is getting ridiculous and seems to be default behavior for most games.
On PC, which is mostly dematerialized, why not, at least, you can use your computer in during the time but I don’t expect that from a console.
There is basically no other choice now as optical drive speeds haven’t kept up with hard drive and SSD speeds. The PS5 for example can read blu ray discs at around 35 MB/s, compared to its internal SSD speed of 7100 MB/s. Doing the math that makes reading the disc over 200 times slower. Imagine the loading screens.
I can’t imagine there’s any way to make optical drives that much faster. The spin rate is already very high and the media size has been standardized. (You’d get a lot more data throughput with a laserdisc-sized drive spinning at the same speed as a CD/DVD.)