No-kid Rule Is Upsetting Too Many People

So I’m getting married in 5 months and my FH and I have no kids of our own and do not want any children at our wedding. Period. We’ve made this very clear from the beginning but are still receiving backlash and I even have close family saying “well you guys just be selfish and I’ll stay at the hotel with them since they’re not welcome”.. implying they’d rather miss my wedding then go 5 hours without their grandson/great niece and nephew. I’ve told my sister that I love my niece and nephew but my niece is too young and wild and she’d have to be chasing her around instead of standing up with me as the MOH and my nephew has at least 5 tantrums/meltdowns a day (especially when the attention is not on him). I am not wavering on the rule and even my FH’s brother won’t respond back to him when he found out he couldn’t bring his 8 children. I get children are precious and adorable to some, but as two people without any children, we just want a peaceful ceremony and a fun-filled evening reception where people can enjoy the open bar and not worry about little ones running rampant or crying or demanding all the attention be on them. Are we as horrible of people as our family is making us out to be?