First off, congratulations on doing Abitur, it will open up many many career options to you. To people not acquainted with he German school system, secondary education is divided by "quality" into three tiers, with Abitur being the diploma you get from the highest after 8 or 9 years of Gymnasium (which the top tier is called). With that, you can attend higher education. Apprenticeships are quite common in Germany for more practical jobs, but there's an awkward overlap between apprenticeships and technical or specialised higher education institutions (which aren't actually called universities, but are basically a less academic version of the same thing. Brilliant, huh?)
So yeah. Doing an apprenticeship to a "Betriebswirt" is more akin to an apprenticeship in business studies - but it's not an MBA, as you do that at university in a subject called "Betriebswirtschaftslehre". Woo-hoo, go German education!
Anyway, I guess your your basic problem is that people are telling you to carry on the apprenticeship route and you want to go to university?Considering the tiny cost of going to higher education compared to the US... go for it. It's well worth the experience.
People should also be more considerate about others' experiences.