I understand that it's frustrating!! It wasn't intentional 😖
This is a bug in After Effects 17.5 where the new camera tools have overwritten the behavior of other tools when you hold the Option/Alt key. It will be fixed in the upcoming version of After Effects.
If you want to try the upcoming version ahead of time, you can install the beta version by going to the Beta apps section of the Creative Cloud desktop app and install After Effects Beta, build 17.5.1×41 or later.