In case anyone is wondering, there are actually subsonic aircraft that can handle going mach.
The F-86 Sabre had a max speed of 687 mph at sea level which is about mach 0.9
But the Sabre could enter a dive from a higher altitude and safely reach past Mach 1 with help from gravity (or another additional source like rockets).
Comparatively, the MiG-15 had poor control authority reaching mach 0.9 and would subsequently break apart if it reached past mach 0.92.
Modern airliners obviously aren’t fast enough to reach mach under their own power, but they also can’t handle the pressure if they used something like a dive so they would also break apart like the MiG.