Of course, anecdotal evidence isn't a very high standard. Thankfully, statistics on this sort of thing are tracked. Statistically, the Tesla self-driving features reduce accidents per mile. They have for years now and as the tech has progressed the reduction has grown as the technology has matured. So statistical evidence also indicates that the person you are asking the question to is also uninformed.
What is probably happening is that it makes for good clickbait to involve Elon and Tesla into discussions. Moreover, successful content online often provokes emotion. The resulting preponderance of negativity, especially about each driving accident Teslas were involved in or caused, probably tricked them into misunderstanding the reality of the Tesla safety record.
While that is the claim, I've never seen an independent analysis of the data. There are reasons to believe that Tesla drivers are not average. I don't know if what claims are true, which is why I want independent analysis of the data so that factors I didn't think of can be controlled for.