Well except for the fact that it would require an amount of fuel something like the volume of the Atlantic Ocean.
Edited to add. Well it looks like I was off by a FEW orders of magnitude
edited to add: And that doesn’t account for staging. As the rocket consumes propellent and becomes lighter, acceleration for a given amount of thrust increases. To the point where it becomes uneconomical to built it heavy enough to withstand the G forces, to say nothing of the Astronauts. The first stage of the Saturn V had to turn off the center engine before it finished to keep the G forces down. Which is why rockets use stages, to throw away and not have to accelerate engines and tankage that you’re not using anymore. And they do that OFTEN. The second stage of the Saturn V fired for ~367 seconds. If we divide 10 yeas by 367 seconds we have close to a million staging events, and each stage is two to four times as heavy as the one before it. Even if we improve things with a higher Isp using Nerva engines that is still an impossible project.
Constant accelerations engines, as featured in The Expanse and Traveller are just as implausible as FTL drives. They are based on plot requirements and not physics.
