Wouldn't it make SENSE to design the World Trade Center to "pancake" on itself rather than topple over in one piece like a HUGH tower?

I watched films of 9/11 and it made sense to ME that the structure would be designed to “pancake” in the event of a massive force (ex., passenger jet) pushing it from the side? Would you design a structure that tall to just fall over intact? Imagine the damage and deaths THAT would have caused? I wondered why the “pancaking” and even entertained the notion held by the conspiracy theorists but now I definitely don’t. I can see it being DESIGNED to pancake and NOT topple in a densely populated city. What do you think?