WIBTA for not bringing partner to wedding or refusing to sit at head table?

Hi all, happy new year and TIA for any guidance you can give.

I (29F) am a bridesmaid in my childhood friend "Alex's" (29F) upcoming wedding. Alex has six other bridesmaids including two of our other childhood friends, "Jill" (29F) and "Carol" (29F). The other three bridesmaids are women Alex knows from other parts of her life. I've met all three before and all are lovely, but I'm not particularly close to any of them. All three of them are straight women who have fairly serious partners but are not married (I promise that is relevant).

I have been in a relationship with "Rachel" (27F) for three years. Jill and Carol are both married to great guys who Rachel has met multiple times--I promise that detail is also relevant.

Alex recently informed the troops that they are doing a head table at the reception that will be just the newlyweds, bridesmaids, and groomsmen--no dates/partners of the bridal party at the table. I tend to think that this is a little rude and don't like it when weddings I've been to have done that, but I think it's a pick your battles situation. Jill and Carol are also not thrilled about it, but all of us decided to let it go.

My issue is with Alex's plan for Rachel's table. Alex told me that Rachel will not be sitting with Carol or Jill's husbands as I kind of assumed she would be. Instead, Rachel will be sitting with the three boyfriends of the other bridesmaids plus some random friends from her fiance's fraternity. Rachel will be the only woman at this table full of men she's never met before. Rachel told me that she's not comfortable sitting with people she doesn't know before we knew who exactly would be at the table.

One of these men at Rachel's table works for a political group that is vocally anti-gay marriage. I don't want to be a snowflake, but Rachel's comfort is important to me. I don't want her sitting with a bunch of men who all know at least one other person at the table, especially when at least one of these men may not react well when Rachel informs them that she's at the wedding as another woman's plus-one. I asked Alex if we could (in order of my preference) (1) put Rachel at the table with Jill and Carol's husbands; (2) put Rachel at a table with my parents and Jill's parents; (3) allow me to sit with Rachel and not at the head table; or (4) put Rachel at a table with Alex's mostly female friends from grad school. Alex shot all of these down for various reasons.

Again, I don't know if being overly sensitive. If Rachel is going to be uncomfortable and Alex is not willing to make adjustments, I would rather not bring her along so she can spend the evening doing something of her choice with people of her choosing. I've toyed with just pulling a chair up to Rachel's table once we get to the reception regardless of what Alex says, but I obviously don't want to cause drama at the wedding and don't want to create a headache for the waiters. I guess I'm trying to get a feel for whether me/Rachel or Alex is being unreasonable here.