I'm not pretending this. But consider that IPSec doesn't exactly have a reputation for being easy to set up or even is particularly well supported across IaaS provider networks.
People revert to stunnel (and OpenVPN), exactly because they may not have the knowledge or inclination to get a fully featured IPSec setup going.
People revert to stunnel (and OpenVPN), exactly because they may not have the knowledge or inclination to get a fully featured IPSec setup going.