If gaming makes $200B/year and a company makes $30B it has more market share than other one that makes $10B.
SIE makes more profit than Nintendo since a few years ago despite having spent more in acquisitions, despite spending more money making hardware, despite spending more money on making a bigger amount and more expensive first party games, despite signing more deals with third parties for their console, despite spending more on signing 3rd party games for their gamesub and despite mantaining a cloud gaming platform.
The important metric is revenue and not so much profit because if they make $30B they can decide if they keep them sitting in the bank as profits or if they reinvest them in things like the ones mentioned above.
And for a company is better to make $30B and reinvest $27B keeping $3B as profit than to make $10B and reinvest $7B keeping $3B as profit. Because in the future thes $27B will generate more money than the $7B. That's why normally the main KPI to check the performance and market share is revenue and not profit.
Apple, MS, Google do a lot of money outside gaming. But in gaming the market leader is Sony, the top grossing company (even if only counting SIE and not the gaming business they have in other divisions).