jewishandworking22 – now I understand that you disagree with the entire “yeshivish society” as you like to describe it. So, your issue really isn’t with this Kol Korei, but with the society in general.
Allow me to give you a Moshol that is similar to this situation: A business owner was advised by a group of Rabbonim that it would be helpful to provide the products that he sells to people who are having a hard time obtaining them. The Rabbonim never told him he can’t sell to other customers. He was just asked, that if he can, he should try to assist the customers who are having a difficult time getting the items that he sells.
If I was that business owner – I would try to listen – of course, only if the sale makes sense – to the Rabbonim.
Your Moshol about the Eruv is a Halachic question. The issue at hand isn’t a Halachic one – there’s no Halacha in Shulchan Aruch to pasken from.
The age gap issue is one that is based on numbers. 60 Rabbonim were shown how there is a problem with our current shidduch scene. They all agreed that if they advise shadchonim to attempt – if the shidduch makes sense – to make shidduchim amongst couples close in age, this will help improve the current shidduch problem. They never wrote to only make such shidduchim. And they never wrote anything more than what they feel will make a difference. To claim otherwise is incorrect.
Your dislike for the “yeshivish society” may want to make you disagree with what they have said. But, if you read what I wrote – you will see what are the true facts as to what the Rabbonim really wrote.