In Ancient Athenae, the ability of the people to govern themselves was considered foundational to democracy, meaning that any eligible citizen could have been chosen by lot to occupy a position of oversight, whether in the Council of 500, ordinary magistracies or jury without any special education or certification. The only position which wasn't subjected to sortition was the generalship, as the only position which was considered to require specific expertise. This system assured that there was never any technocratic monopoly of positions of power by professional experts over amateur laypeople who would not be able to check them because of the educational gap; any mature individual could participate in government without having to undergo difficult, long and expensive training that would set them above the rest in comprehension of a particular subject.
However, that was then. Nowadays, technocratic expertise seems to be the basis of society; all important institutions and infrastructure are staffed and maintained by a select group of educated individuals. This gap in education naturally creates not only a power imbalance between those in the know and those not, but also a group interest in-between people in the know against those not in the know, i.e. guild-like behavior. Even if we were to abolish bourgeoisie, this class of technocrats staffing everything, like judiciaries as professional lawyers and judges, would remain and so would their claim to greater authority over their fields of expertise than some amateurs and laypeople and just like that, we have a technocratic government composed of professional guilds.
How would anarchism prevent this from happening?