Hypothetically, let's say you live in the UFP in the 26th century, you're a suburban home owner with your own personal "Shuttle Craft" or "AstroMobile (Space Car)". You want to go on a trip with your family to explore "Nearby Space".
There are UFP maintained TransWarp Conduit Freeways that connect all the major systems of all member worlds, so the average civilian doesn't need to own any FTL drives or need engineering degrees to maintain their own FTL capable reactor or drives.
Any personal spelunking they want to do in nearby UFP space or go off the main trails/routes, they can attach their STL "Shuttle Craft" or "AstroMobile" to a standrdized dockable Personal Warp Ferry system consisting of a Warp Ring or Warp Sled to let them travel independently, which are powered by a Condensed Energy Matrix Battery (Similar to the Condensed Energy Matrix battery we saw in ST:VOY ep of Warhead that allowed the WMD Torpedo to travel 80 ly's on it's own battery pack).
But traveling into space in your own vessel, you have two options:
1) Fly there on your own Mini Fusion Reactor / Battery power and waste your own resources to break Atmosphere and Earth/(Planet you're on)'s gravity field.
2) Go to the local Linear Catapult Launch Tower and exchange SIGNIFICANTLY less energy resources/credits to have them launch you into space. You spend almost no resources of your own fuel/battery other than needing to turn on your personal shields for space launch.
Which one would you prefer?
Linear Catapult launch is now standard across the UFP for civilians using their own personal "ShuttleCraft" / "AstroMobile". It is very safe, safer than 21st Century Air flights.
There are UFP maintained TransWarp Conduit Freeways that connect all the major systems of all member worlds, so the average civilian doesn't need to own any FTL drives or need engineering degrees to maintain their own FTL capable reactor or drives.
Any personal spelunking they want to do in nearby UFP space or go off the main trails/routes, they can attach their STL "Shuttle Craft" or "AstroMobile" to a standrdized dockable Personal Warp Ferry system consisting of a Warp Ring or Warp Sled to let them travel independently, which are powered by a Condensed Energy Matrix Battery (Similar to the Condensed Energy Matrix battery we saw in ST:VOY ep of Warhead that allowed the WMD Torpedo to travel 80 ly's on it's own battery pack).
But traveling into space in your own vessel, you have two options:
1) Fly there on your own Mini Fusion Reactor / Battery power and waste your own resources to break Atmosphere and Earth/(Planet you're on)'s gravity field.
2) Go to the local Linear Catapult Launch Tower and exchange SIGNIFICANTLY less energy resources/credits to have them launch you into space. You spend almost no resources of your own fuel/battery other than needing to turn on your personal shields for space launch.

Which one would you prefer?
Linear Catapult launch is now standard across the UFP for civilians using their own personal "ShuttleCraft" / "AstroMobile". It is very safe, safer than 21st Century Air flights.