The post you link is not an explanation. For CentOS 8, we no longer rebuild Apache for suexec in /home, as you note.
Jamie has been working on support for fcgiwrap, but the version of Apache in CentOS 8 does not support it (but nginx on CentOS 8 does, so this is the one weird instance of nginx working more easily with CGI than Apache…but if you need CGI, at this point, we just recommend you use a distro other than CentOS). But, the better answer is “don’t use CGI”. There are many other/better ways to run web apps. Perl has several good app servers available.