Well, it does offer more varied stuff from the get go so I can see why someone wouldn't want to limit their options, HAProxy was and is purely a proxy while NGINX is a bit of everything.
SPOE/SPOA added a bit of programmability to HAProxy but it is still basically only messing around with headers and acting upon that, nothing to do with content.
SPOE/SPOA added a bit of programmability to HAProxy but it is still basically only messing around with headers and acting upon that, nothing to do with content.