"DMCA notice pages" are something these businesses made up for their own convenience, to better funnel the notices to the right people and make sure they're in

"DMCA notice pages" are something these businesses made up for their own convenience, to better funnel the notices to the right people and make sure they're in the right format so they can deal with them faster. You don't have to make such a page -- most businesses don't. You don't lose anything; the act is in force whether you copy its terms onto a page of your website or not. Until you have millions of customers, "too many companies are sending notices to our sales and support mailboxes instead of our DMCA agent" probably isn't a problem you have to address.