That’s cause you can still scroll if the post takes your entire screen (at least i can) and if you click on the post you can just exit with the arrow at the top left corner
I think NFT’s had some promise for stuff you actually have to own (not some ape pictures). Like a digital version for maybe an invitation or tickets or if done properly (by your countries government for example) maybe even for stuff like licenses (i.e. driving license, welding license etc.) Or identification (passport, id, etc.)