I generally do not find it "super cool" when I suddenly/unexpectedly have new areas to investigate.
In most cases, the developer dealing with lighthouse scores is someone who just built a website to a client's spec, only to find out that there are things that it flags which are very time consuming to deal with. Set expectations all you want, but they want a near 100%.
To do all that work only for the score to drop later makes you as a developer look bad. A client who doesn't know any better will suspect you did faulty work.