You're saying getting Pottery early (presumably for granaries) is potentially better than hitting the Republic slingshot?
Yes. If you have a start with no food bonus, it takes 20 turns for a city to grow 2 population points. With a granary it takes 10 turns. So, 10 turns for a settler instead of 20. For a worker it takes 5 turns with a granary instead of 10. And early on especially, settlers and workers make for the most useful units.
If you play a huge map, tech cost also ends up kind of high. If you have no barbarians also, getting Pottery from a hut isn't possible. Many civs may have something to trade for Pottery in time. Also, if you play as Germany, your starting techs are those techs that the AIs tend to research first. So, you may either have to wait until you finish Alphabet to trade for Pottery, luck out with just getting to some AI in time with warriors as scouts, or wait until later to trade for Pottery.
If you played as Rome with all civs as seafaring or commercial, then you either have to research Pottery or trade Writing for Pottery, or wait to trade for Pottery until you have Code of Laws (paying gold for Pottery isn't advised if trying to complete The Republic slingshot). Trading Writing away while trying to get The Republic slingshot can mean that some AI will research Philosophy, especially The Byzantines ... at least they seem to prioritize researching Philosophy more than other AIs.... most AIs seem to research Map Making first, but I doubt that the Byzantines will do that.
Do you use CrpMapstat? Trading become a lot more manageable for me once I started using it.