◇ Could this help me?
Yes. Output styles are a real, reversible setting, and BLUF is a well-established writing discipline that genuinely improves the readability of long answers, so this is a low-risk change with a clear payoff. Ignore the framing that the default style is a deliberate scheme to produce filler. The default is simply tuned to be thorough, and a shorter style is a preference, not a fix for sabotage. This is a general practice.
Create a custom output style for me based on BLUF, bottom line up front. The rules: lead with the answer or recommendation in one sentence, follow with at most three supporting points, use plain language with no jargon unless I ask for it, and drop preamble and restatement of my question entirely. Show me the style definition before saving it, and show me one example answer written both in the default style and in this one so I can compare.