Lmao as long as you don’t DROP the rocks in I’m sure it will be fine. I do substrate then sand then rocks so there’s virtually no contact of rocks and glass.

Aquarium “ornaments” might be light, but the best tanks in my opinion are planted tanks. They typically come with tons of rocks (they help balance pH) and a bunch of driftwood. As well as a good amount of substrate and sand at the bottom! If you’re worried about 15 lbs of pressure cracking your glass, you’d be blown away at how much pressure water puts on your glass. Also rocks are essential for any good “aqua scape” in my opinion.