That's fine. You also miss all papers not on arxiv. You miss published versions of even the papers on Arxiv (which are often improved versions), and you miss any benefit peer review has on those papers.
I use arxiv nearly every day, and also a few places that get things not on arxiv because the majority of papers are simply not there. Arxiv is paid for by universities paying subscriptions, locked in for five years at a time. It's also funded by Simons Foundation (which may not pay forever) and Cornell and many individual donors. Affiliate groups like professional societies and govts pay huge sums to keep it running. Many companies pay 10's of thousands annually to be members.
Piggybacking on their money while taking affront at a bigger, more comprehensive service, because they dare post an ad, seems somewhat short sighted, but to each his own.
Since a significant number of job postings for researchers as well and communication and networking opportunities are widely used on Research Gate, none of which is present on Arxiv, you are simply missing likely useful contacts and tools for your career. And I write this as a researcher for several decades, long before any of these were live.
As I said, enough people find value at research gate that millions do pay.
As a researcher I don’t see any value there. I’ll stick with Arxiv, thanks.