Judges issuing warrants is one of the least accountable aspects of our legal system. Warrants can cause major damage, disruption, or even death. There are never consequences for a mistake (cf. Breonna Taylor incident).
They can also cause political interference and there's little mechanism to prevent abuses. The FISA warrants against Carter Page were later declared invalid[1]. Document mishandling sometimes resulted in essentially nothing (Clinton, Biden) and sometimes warrants and raids (Trump). There could be good reasons for all of this but there's not really any mechanism to sort it out. Next time there might not be good reasons, and the target might be a politician we desperately need (rather than Trump).