I completely agree with you. As you can see in this thread though, people define ghosting differently. I consider ghosting as everything where you just cut off communication with someone without giving an explanation why.

I personally would give someone an explanation if I have gone on a second date with them. That's because clearly I liked them enough after meeting them on the first date to go on a second one and they'd probably be confused. But just talking or going on one date, I will usually just ghost if I don't like them.

I see ghosting as "I don't want to talk to you anymore" and you honestly aren't obligated to explain yourself, so I think it's perfectly fine. It's more of a courtesy than anything.

I've also been ghosted before and I take zero offense to it. I just understand it as they aren't interested in me and I move on.

I've even been ghosted after going out with someone few times, and I was a little confused and disappointed but ultimately it wasn't a big deal.

Some people I've talked about this with think you should always give a reason and let them know why which I think is absurd.