Not having an agent is generally a big asset when buying a home, much more than anything an agent will bring to you.
Ooof. Gotta be careful with this one and understand agency law in your respective state. That listing agent may not actually be working for you the buyer, even if they help you fill out the paperwork.
I can’t speak to California law, but this isn’t explicitly true in either market where I work. Non-agency is a thing in some places, and depending on the terms of the listing contract the listing agent might pocket both sides regardless if there isn’t a buyer’s agent.
I’d also argue that there are a lot of properties where a buyer benefits from expertise on the part of an agent - either negotiating strategies or local market concerns. In my market for example understanding environmental and construction issues and value add that a buyer won’t know without doing meaningful research on their own.