Pluto lost its planethood with great fanfare, to the extent that most people at least vaguely know that happened. As such, there's not much confusion when someone refers to Pluto as a dwarf planet or the eight planets or whatever.

The planets are also something which people essentially only encounter as science. You don't go to the supermarket and buy a planet, you can't go and spot some in your local river or whatever. The nearest would be being able to point out Mars or Venus in the night sky.

This is unlike fish, reptiles, fruits and berries, etc. And it's different from my personal least favourite example of this kind of pedantry: poison. Unlike venom, which is basically just a scientific term, poison and poisonous is an everyday term.

Science needs precise terms in order to do science properly. But that doesn't mean that scientists - or more often those interested in science - need to enforce those precise terms on everybody else.