This whole topic is stupid and pointless.... making assumption of how big engines is and how they work in space game in thousands years from now.
Perfect topic of mirroring stupidity of humanity.
If you're completely happy going through life not wondering how things work and not giving a damn about his thing fit together, that's fine.
If, like me, you enjoyed taking things apart as a kid (leading to them rarely going back together properly!) Who enjoys learning how things go together and how they work, that's also fine. It's how things are learnt, expanded on and improved.
If you think like that in real life, then you'll think like that in game too.
Just because you don't care about something, didn't make it stupid.