simpler? maybe a little. simple? no.
buying bitcoin is not that complicated now either, so maybe there is room to make a bit simpler but at the same time i believe that the governments will continue adding more roadblocks and complications such as KYC so that they control and monitor who buys bitcoin, how much,... and the more popular bitcoin gets, the more they would try to take control. so even if the buying methods themselves were became simpler that extra difficulty would be added on top.