No they isn't, there is a rigid ring holding it so you cannot freely flop it. 😉
But you're missing both the point and the joke.

I am familar with their innards: as a kid we have opened up absolutely everything we had. 😀 8", 5"¼, 1.44, also HDDs from RLL to most recent ones, SSDs, you name it. To flop a disk you need floppy inside as well as floppy outside! 😀

As for Linus, his first computer was a #VIC20 and started on 6502, so I daresay inside of his SinclairQL heart there is a hidden #6502! 😀