I feel like AWS/cloud would be more in house, though it's more a trust issue than anything else. Infra is the backbone of a company, and something some people wouldn't trust to a part time freelancer. Or someone laying on a beach in Bali might not be so accessible in the 0.1% of time the site goes down. Whether or not this is true, it is a perception.

There's also probably more web dev jobs out there. You probably need only a small amount of infra people at any one time, but are developing a lot of features, some of which are low priority and can be outsourced.