This would be repeatable weekly. Currently delivery quests require you to craft 6 items you can buy from a merchant and hand them in in less than 5 minutes, something a bot would have an easier time doing already. So the journey would be a less time effective way, however, would yield about 600 more scrips, enticing people who like to travel and justifying the harder work. Also, if the random encounters happen a bot would have to know how to fight effectively but even if they did not bots are not a reason to deprive users of content they may enjoy. We already see bots in dungeons and fights no matter how you report them. I do not see how this would improve or worsen the bot issue in FFXIV.