That's an assumption. He's not saying either of those things. He's saying the situation is unreasonable & thereby the man ordering it, & that's because this crisis is unreasonable, according to the captain, the admiral, & the fact that they are probably violating treaties to send Picard on an espionage mission. Nothing about this is going to be reasonable, & everybody gets a share of that, including Geordi & his teamLAFORGE: Yeah, well, I don't mind making changes and I don't mind hard work, but the man isn't giving me the time I need to do the work. Someone's got to get him to listen to reason.
If he's not getting the time he needs then they will likely be cutting corners and something's going to go wrong....
I can just as easily presume that the worst case scenario for Geordi not getting "The time I need" is that he falls short of making the ordered changes by the deadline Jellico gives him, & probably has to have an earful about it, but then just goes on working at it. There's just as strong a chance that Jellico knows how long the things he ordered will take, & if he's telling Geordi to do it faster than that, he would then expect Geordi to fall short of finishing on time, & is only giving that deadline to see if they can improve the speed, because maybe every minute is vital
Picard has done the very same thing to Geordi in the Sheliak incident, telling him to do something nearly impossible, knowing he might not get there, or at least get there by the deadline, but... maybe he will, & it has to be ordered nonetheless