It would if it was `@arminwolf@arminwolf.at` without the need of another server (soc.schuerz.at).
What Friendica is doing is having RSS->AP bots as a built-in feature. It suffers of the same problem of bots: there can be multiple unofficial bots and each of them depend on a third-party service (other that my instance and the feed i.e. the Friendica instance or the instance of the bot).
For example this is the WordPress site from the AcrivityPub plugin author: @pfefferle
No other server involved, but it needs to "speak" AP.
I am suggesting the same experience for the end user but behind the scene the Fediverse instances are reading the RSS feed of website and then presenting them as AP actors that only publish. If this will be made in a standard way, we would see each other's interactions on feeds.
