That's an exaggeration. They are no bigger than any other phone in a rugged case. If anything a bit smaller really since the "rugged case" is integrated into the phone. I have my work iPhone in an otterbox and its far bulkier than that.
I use my Samsung S9 without any case since the Gorilla glass is more than sufficient for me. It had its fair share of falls on the road when I was getting out of a car - still looks almost new. It even slid down from the top of a roof into the gutter when I was fixing an antenna there - few minor scratches on the back, nothing more.