I think it is not a different problem. The FT process depends on many different paths, some of which build up larger molecules and some of which break them down.
If you insist on making liquid hydrocarbons you need to be balanced on a knife edge -- HCs like to polymerize towards polyethylene (violently, blow up the container so) or break down to methane when heated. Thus you need a big factory to make a small amount of product and you might need to shut it down when the reaction vessel gunks up with petroleum jelly.
With solar and carbon capture now you need to run an aniline stripper and a hydrogen factory but people dont care because of unicorns, rainbows, and all that.
If you insist on making liquid hydrocarbons you need to be balanced on a knife edge -- HCs like to polymerize towards polyethylene (violently, blow up the container so) or break down to methane when heated. Thus you need a big factory to make a small amount of product and you might need to shut it down when the reaction vessel gunks up with petroleum jelly.
With solar and carbon capture now you need to run an aniline stripper and a hydrogen factory but people dont care because of unicorns, rainbows, and all that.