That’s not true. If forced the micro sd card can also go in the wrong way and then it’s a pain to remove it, might even cause some damage.Typically these cards actually physically cannot go in the wrong way, so no danger.
@Colif You know you have inserted it properly if the last 20% has a spring motion that clicks into place when fully pushed in. If there’s no spring action and it feels rough to push in then you are inserting it wrong.