They wouldn't miss out on them if those sales are instead paying two or three times that over the course of the year.
For the whales that buy many of Sony's games day one, sure they might average less made on them per year. But consider all the people who buy the games when they are on sale under $20 (or not at all), if you can get a portion of them on a subscription you could make more from them over the long run.
lol buying a game full price is considered a being a whale now?
So say they sell beacoup copies of TLOU2. And then they got another game that could sell a few months after (Ghost of Tsushima). Say combined with TLOU they sell like 25 million copies in the first few months, even with potential discounts that's a lot of money to leave on the table.
So while it might make sense for Microsoft, it doesn't make sense for Sony. It seems less risky to let the software sell because that's what's been working, than to hope you can lock ppl in long term through a subscription.
Even when they sell at 40 that's a guaranteed 40, then hoping the subscriber will stay subscribed for three or four months.
Also Sony doesn't really have GAAS games that make more sense on subscriptions, which is why again what works for Microsoft might not make sense for Sony. Same with Nintendo that has software that rarely ever goes on sale and do numbers above 10 million easily.