that has not been true since the 90s. if it were true, there would be more exclusives today, not less. there are much less exclusives now. nobody buys a console for one game.
The Last Guardian, Final Fantasy XV, Splatoon, Smash Bros... Some people said they bought X1s for Scalebound and Killer Instinct but might've been exaggerations. But, one game, 2-3 games, people still want to and buy consoles for their exclusives.