Because Naylor doesn't really fit. He's a 1B who doesn't play good defence at first, is not a great contact guy aside from his outlier 2023 season, and has decent power but not enough of it for how little else he brings to the table.
He's a career .767 OPS, 112 wRC+ guy who's hit 30 dingers exactly once and would almost certainly be stapled to the DH spot for the Jays given that Vladdy is his superior in every conceivable way.
Yes he adds another bat, but not one big enough to really move the needle, and would probably not get nearly the attention from this fanbase if he was not Canadian.
I like the guy. He's an OK, fun player. But he's a 2ish WAR 1B/DH only player on the last year of his contract and probably looking for a raise that wouldn't be smart for the team to give him. That's not something that should get anyone excited.