Upholding this would mean that all articles about substantial subjects would become enormous, unreadable messes. Editing for clarity and coherence is not Wikipedia’s strong suit, but a policy of no-cuts-ever would be worse.
I think he means whole-page deletions, not text deletions. But even so I agree with your point that the thing is already in some danger of having star wars crowding out real science & real history (*slight *exaggeration for effect :)).
If I wanted to put up a vanity page about Me! and it was against policy for it to ever be removed, it’d take about a month for wiki to be comprehensively destroyed.
Maybe we’re so cool that the gamelan ensembes are intimidated by us?
I’ve run into a few articles lately that verged on “enormous unreadable messes.” Usually Wikipedia articles are resonably concise, and are organized in such a way that the “extra” info is in a separate section, even a separate page. I think one of the messy ones was for a TV show. I wanted a premise/plot synopsis, which is normally available, but this page had waaay too much infomin what was supposed to be a summary.
So, yeah, I’m in favor of reasonable amounts of cutting.