Air-gapped wallets are actually not complicated at all and I recommend them to everyone who has cryptocurrencies of a higher value.
Maybe but the usability goes down with every step in increased security. The best and easiest to use are extension wallets and mobile wallets. When you use switch to hardware wallets the usability drops a bit and even more when you go for air-gapped wallets. The trade-off that we can't escape.But air-gapped wallets are something you'll use for long-term storage, so you won't realistically use them often. Even if you use them daily, I don't see a problem that their usability is not at the level of average HW, because all you have to do when sending a transaction is to confirm that transaction by scanning a QR code (fast option) or using an SD card (slightly slower option).
I don't know if this is your conclusion from personal experience, but I have one such device and so far I have not gotten the impression that it is more difficult to use than what we call ordinary hardware wallets.
Extra security comes at a price, but I'm happy to pay that price, whether it's money or a little more time.