They aren't close to 50/50, here you can see the last half and a year:
This quarter PS physical game sales (1st + 3rd party) were 15% of the total physical + digital game sales on PS. The PS physical game sales (1st + 3rd party) also generated this quarter 7.41% of SIE's game software revenue or 3.72% of SIE's total revenue.
"Physical Software" and "digital software" are all PS5 game sales for both 1st and 3rd party games on PS4+PS5. Digital is like 5x times than the physical ones.
In the recent years there has been a multiple years long trend of physical game sales being replaced by digital sales in the gaming or console market: digital game sales increase and physical game sales decrease.
There's a more important trend: game sales revenue being replaced by add-ons revenue, the biggest and fastest growing segment in the mid/long term trend. Not only in PlayStation, but in all gaming platforms and in consoles too (PC and mobile are obviously mostly digital).
Notice there's also "add-on content" there, which is DLC+IAP+passes for all PS4+PS5 games. Which also is digital revenue and generates even more money than the digital game sales due to the huge success of GaaS games.
The "other software" section is the revenue made by SIE games in non-PS platforms (mostly PC, so mostly digital too), something they started a few years ago but it's growing and in a few years may be generating more money than PS physical game sales.
You also have to consider that Sony also makes a substantial amount of revenue coming from "network services" (game subs), also a digital revenue source that keeps growing every year.
These are the reasons of why publishers bet more on digital games, GaaS and game subs than before. Or why the new PS5 has a detachable disc reader.