Don’t take it in to personally most people are just joking. I agree with you the front sensors are very useful, I’ve. Kona and it’s fitted with them. I’ve ordered a Niro 4+ top spec in the UK and it come with front sensors. They are very useful and I agree with you should be fitted.
I had the front sensors on my 2014 car, but don't on my 2019 US Niro EV. I really miss the sensors. I ended up putting a tire mat with little humps on it in my garage so I don't hit the steps when I park. My wife didn't like the idea of a tennis ball hanging from the ceiling. I'd rather have the sensors.
There are after market options that can work really well : https://www.homedepot.ca/product/homeguard-garage-parking-sensor/1001067539
this has not happened to me, though I notice it wants to brake often before I think it is necessary. I disabled it...or maybe there was a setting I found to make it less paranoid. I no longer recall.