Does studying openings I don't actually play myself help my overall understanding?
These answers restate the rules implemented by our open-source engine, which follows the WXF laws and is regression-tested against the official 110-diagram repetition casebook. Where an answer refers to a specific position, that position lives on the linked reference page, where the build verifies it against the engine before publishing.
Direct answer
Yes, in moderation. Studying opening systems you do not actually play yourself still builds genuinely useful pattern recognition, since it exposes you to different kinds of middlegame structures than the ones your own repertoire always produces. It should not replace deep familiarity with your own systems, but as an addition, it broadens your sense of what different kinds of positions look like.
What this actually builds that your own repertoire cannot
Every opening system tends to produce a characteristic kind of middlegame, sharp and tactical, slow and manoeuvring, soldier-structure-heavy, and only ever studying your own narrows your exposure to whichever kind your systems happen to produce. Looking at other structures, even ones you will never play, trains recognition of patterns you would otherwise only meet by accident.
Keeping this in proportion
Most of your opening study time should still go toward the systems you actually play, since that depth is what shows up directly in your own games; see building an opening repertoire you can trust. Studying outside it is a genuinely useful supplement, not a substitute for that core work.
Related questions
Should I study openings I actively dislike playing against?
Especially those, since understanding an opponent's plan from the inside makes it considerably easier to meet across the board.
Is this a good use of limited study time for a beginner?
Less so early on; a beginner gets more value from basic tactics and checkmates than from broad opening exposure.