Thin content that Google clearly does not value (indexed but few impressions and clicks) is a problem for SEO and not only for that page, but for other pages on the site. The idea is that thin content detracts from higher quality content that Google does prize.
Google PageSpeed and web vitals are clear: a relevant site must load fast and not messily. The should be a speedy first contentful paint (FCP), and there should be little cumulative layout shift (CLS). A better user experience means a better search engine optimization.