This implies that getting into a fully equipped Viper will be significantly easier in solo than in open play. There is no evidence for that.
Don't know why they'd bother... since SB1 kicked in I've ONLY played in open mode, NEVER been pirated, strolled away from every interdiction, worked up to a Lakon 6 once and only lost it coz I pressed "boost" instead of "thrust" while in station and half asleep, and have since worked my way back up to a Cobra and about to get into my second Lakon 6. You don't need Solo mode to grind right now, at least in open mode you occasionally see a hollow square and they might flash their lights at you.
I'm expecting it'll change with SB2... there's be better instance balancing for a start and possibly the introduction of player interdictions and some improved mechanics for piracy to placate the PvPers... it can't stay a trader's paradise forever.