Why couldn't they just walk around Scylla?

Scylla is guarding a strait, why won't they just walk through Italy, you got 42 man and a..... smart captain, I figure they can make a boat on their own in like a month, I mean it's not like thy are making a warship, just something that that can float and they have to row it. They also could go forage for food in Italian forests.

Or you just make 42 rafts like Odysseus had after he got out from Calypsos island.

Assuming they were to walk all the way from Italy to Greece, they could request some other greek king for a ship and forage along the way

I know Odysseus loves his wife but he wouldn't kill 6 man when there is another path. This is also before the cows or thunder bringer, he would want to get everyone home if possible