I think people can and should use tools in whatever way benefits and suits them. So, I have no ideological objection to withholding the Majors because you want to divine, playing-card style, but happen to prefer the artwork in a given tarot deck. I would leave all the Minors, including Pages, and modify whatever playing card spreads you use accordingly. I don't mentally equate women with children, so I would not assign that dual meaning to the Page.
However, from a utility-focused perspective, I think the Majors can still help you achieve the insight you want into other people and events. They might shed some light into the 'Whys' of the mundane elements you are exploring. For instance, if the Minors suggest someone is engaging in theft and deception, The Devil could give a bigger picture view of those small occurrences, suggesting that person's spiritual/mental struggle is one of addiction and enslavement to personal desires. Or perhaps it's the Star, indicating a weakness in or lack of vision. Etc, etc.
ETA: Speaking as one who has always been more attracted to the Minor Arcana and views them as the heart of MY tarot experience, I still think the Majors are the defining characteristic of tarot and that not using them is somewhat like buying a convertible car and only ever driving it, 100% of the time, with the top up. It seems an amputation of the built-in potential of the device or tool.
However, as I said above, tools are what you want to make of them, and if for whatever reason you want to use a tarot deck in lieu of playing cards, you by all means should.