Anyone enamoured with this type of stuff should watch the movie Aniara. It's a great movie that illustrates what a delusional fantasy interstellar space travel of this form is.
I am a big space exploration fan, but beyond our solar system, it's probably best thought of as a fantasy entertainment genre.
Aniara is not a good example - the ship was supposed to do a regular interplanetary flight orogonally before ending up on unplanned interstellar trip to oblivion due to drive failure before they could break to their destination planet (+ some apparent strife in the Solar System at the time, so no one could mount a rescue mission in time).
That is totally something that can happen if you have a high performance interplanetary craft that does trips between planets in weeks - any trajectory is likely hyperbolic and if your drive fails before you brake again & no one can catch up with you in time you are kinda screwed.
I am a big space exploration fan, but beyond our solar system, it's probably best thought of as a fantasy entertainment genre.