He must be on some of that goofy dust.
SIE have a ton of IP they've cultivated from the beginning. Parappa, Gran Turismo (did he forget that exists?), God of War, WipeOut, SOCOM etc.
The problem is that for a majority of the IP, they haven't done enough retention of them with new iterations/installments, leaving many to fall to the wayside and become dormant. Worst part being, SIE have a ton of legacy IP that would fit just fine in the market with maybe a few changes while still retaining their core identity. Some of those could even be leveraged for transmedia operations.
But needless to say, they haven't done a great job at this. Most gaming companies are guilty of this, actually, even Nintendo to an extent. Though Nintendo have arguably also been the best at long-term IP retention within the industry; creative strokes of genius like using Smash Bros. as a catch-all for otherwise niche IP to retain some relevance and gain a higher profile over time have helped with this.
SIE could've been doing many of the same strategies but they've let so many of their legacy IP go dormant, so it'd be much harder.