cherrybim: Your opening point only addressed the point; it missed the Shulchan Aruch quoted.
Regarding your second point, it isn’t a “weakness”; it is a Shulchan Aruch even if you injudiciously think you’re “strong”.
Additionally, requesting a seat change for this reason is no different from a practical standpoint from requesting a seat change in other to sit together with your children or relatives or whomever you’re traveling with that was originally seated elsewhere or because you don’t want a middle seat or don’t want to sit next to a baby or need to be closer to the front etc. If you’re okay with any of those last minute seat changes you have to be okay with a similar seat change request for moral or religious observance reasons.