I know my single story isn’t coming down like a tower,

No, but good chance it collapses anyway. I know 100% my building isn't going to fall due to an earthquake ever.

And those towers in parts of Japan and LA have faced severe earthquakes without collapse.

but like the Twin Towers proved

Several entire floors were destroyed and set ablaze simultaneously, blocking off the stairwells and ensuring an incredibly large part of the building was on fire at the start. Not in any way comparable to a standard fire starting in a condo tower.

like the residential tower in the UK that went up like a candle

Sure, and in any sane country that's entirely illegal to do. There are zero buildings with flammable cladding in my city. And having seen apartments on fire in other buildings, and that fire failing to ever spread to another unit, I can indeed confirm that most buildings do not have fire spread between units.

Internationally, I don’t stay above the fourth floor

Utterly ridiculous of you, that is a completely irrational phobia. If tall buildings were as dangerous as you think they are we'd have millions of people dying in them annually, but we don't. Even considering some of the shoddier builds in China, apartment fatalities are rarer than people dying in their own houses.

was that it could spread before symptoms presented strongly, and that there was strong asymptomatic transmission

And yet in a positive pressure building it did not spread, even with confirmed cases in some units it never spread to any neighboring units. We would have been very aware if someone had been symptomatically spreading it in the building as we would have had cases spike, but that did not happen. So no, even a very transmissible airborne virus will not spread between units in a well designed tower.