That's just in your imagination. You imagine what you want to imagine. The funny thing is we've actually seen Bailly against those teams and he did everything but 'hold the fort'. He was absolutely terrible twice against City, got schooled alongside a broken toed Smalling against Chelsea when we lost 4-0 and left Morata with a free header when we lost 1-0. The only big game where he even remotely played well? He scored an own goal against Liverpool.
Lindelof in constrast has played against Chelsea and Arsenal, games where we won. Until he's exposed in a big game like Bailly has been countless times, it's all in your imagination.