If I consume Bud Light, then I have to pay for the Bud Light, I think it typically costs less, the price, the raw price is less than Guinness but I also pay an additional cost from the fact that Bud Light, when I drink it, causes me "disutility": we'll put it politely like that.

如过我买百威淡啤酒,我必须要支付百威淡啤酒的价格,我想它会便宜点,原材料的价格比吉尼斯低,但我同样要支付附加成本因为百威淡啤酒,当我喝它的时候,味道一般,我表达得委婉一点

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Because it allows you to very softly express a dislike about a suggested action.

因为这个句型能让你以一种委婉温柔的方式表达对某一提议的否定。

I'd rather 课堂 - SpeakingMax英语口语达人

It's a little bit more indirect, but it gets the same message across.

这种说法更为间接委婉，但也表达了相同的请求。

Would you please 课堂 - SpeakingMax英语口语达人