…but backpacks are.
Flip your backpack around, bam: You got a frontpack!
You also have the answer after you try: It functionally sucks.
There are some niche packs that are actually used but it’s under special circumstances like backpacking with it as a supplemental pack, combat, or maybe search and rescue.
Yeah, they work for sure, but you gotta get them set up just right or they’re a pain in the ass. Well, I don’t know about that specific brand, but in general.
They’re good for lots of things outside of the usual, though. There’s a lot of use for them with various disabilities, and they’re great when you have to wrangle kids or dogs out and about. Backpacks have to be taken off and dug through, chest or belly packs are more single hand friendly. So are good sling bags afatg.