Why is a direct call rule in inappropriate solution for the problem?

A developer needs to trigger an Adobe Analytics s.tl() onClick on all buttons across all pages in one of the site dircetories. The developer creates a direct call rule to set the s.tl() for the buttons.

For example:

www.acme.com/pageswithbuttons/index.html

www.acme.com/pageswithbuttons/anotherpagewithbuttons.html

Dynamic Tag Management (DTM) is currently embedded on all site pages. There is no data layer on the site. The site’s IT team is too busy to help the developer.

Why is a direct call rule in inappropriate solution for the problem?
A . s_code’s doPlugins is appropriate for this type of tracking with in DTM
B . Direct call rules only have one condition (a string to call the rule)
C . Direct call rules have many conditions but NOT a pathname condition
D . A Page Load rule can fire a s.tl()