Critique request: three 筹备 sentences: 有的人的筹备很不合理 and 北京花了很长时间做筹备工作 and 不需要筹备任何配料 (Update: There was a typo: 之间 should be 时间.  I corrected it.)
I wrote these sentences to practice using 筹备 instead of 准备 which I'm more familiar with.

脱欧后，有的人的筹备很不合理！
北京花了很长时间做筹备工作，不过因为冠状病毒的发现，政府推迟新年的庆祝。
西红柿炒鸡蛋是个很简单的菜，不需要筹备任何配料。

I'm seeking a critique of these sentences.  I've basically mastered HSK4 and am working on HSK5 now.  I'm particularly interested in what would happen if we replace 筹备 with 准备.
(I refrain from giving an English translation, as it seems to confuse people more than it helps.)
All of your sentences sound weird.

Barring other grammatical errors, 筹备 is used to describe “collate resources to prepare for an event”. 


  日本政府已经花了好几年的时间来筹备今年的东京奥运会。


The Japanese Government has spent a few years preparing for the Tokyo Olympics this year.

Your first and third sentences don’t sound right because they don’t refer to an “event” per se, and you should state clearly that the Beijing government was preparing for the New Year celebrations in the second sentence.