It's not feasible to have a bus stop right in front of every house. It's unavoidable that most people are going to have to walk a bit. How far is reasonable, is a matter of trade-offs. It also depends on how fine grained the network is. If there are buslines every block, it's annoying if they don't stop there. But you have to walk a block or two to get to a bus line anyway, walking that bit more to get to the stop itself, matters a lot less.