They don't reduce request count. For example, Chrome only allows 6 concurrent connections (requests).

If you load 10 images in 1 request, you've reduced network latency and avoided the connection limit.

If the problem seems vague, then the solution is not for you.

The concept of a "mom test" is condescending as well. Many moms code.

As a publisher. One who seeks to decrease load times on pages that require many resources.