It's a great question! The idea is that clear bags are, well, clear, so it's easy to see what's inside without having to dig through a bunch of stuff. It's kind of like when you're at the airport and you have to take your laptop out of your bag - it's just easier for everyone involved! Plus, it's way more efficient than having to search through a million different bags.
And, let's be real, it's not like you're going to be carrying around a uge bag anyway - most clear bags are pretty compact. You can fit all your essentials in there, like your phone, wallet, and snacks (because, priorities!), and still have plenty of room to spare. It's like packing a beach bag for a day out, but way more convenient!