Link can go dead. After a week, or year, it went dead or domain sold to a spammer or virus site.
When link go dead, you often forgot what the link was about, if after a few years. If you did not write a summery of the gist.
Sinisters sites often secretly tweak the title or content in evil ways. E.g. NYC and other corrupt mainstream sites. So, the time you posted the link, and when other people read it after a few days, the nature changed, you are usually not aware of it.
With link, if the link owner is not a good person (ad spammer, influencer drama grifter, deepstate propa, crypto scam, etc), typically, you are helping their clickbait, virus, scam, or logging who clicked it, etc.
Why Screenshot is Better
With screenshot, it is a perm record of the content, at the time of post.
With screenshot, you specifically, cite the parts that you want to express an opinion. Not a brainless link dump the lazy masses do, which is the main way fakenwes spread.