Some manufactures keep great visibility. My Subaru has very narrow A pillars and good blind spot visibility. I can adjust my mirrors to get rid of almost all blind spots on my Impreza.
Apparently instead of just making the pillars thicker to satisfy rollover ratings like many manufacturers, they used some engineering and higher strength materials to reinforce it. (https://www.subaru.ca/WebPage.aspx?WebSiteID=282&WebPageID=2...)
My wife (unfortunately) has a Jeep Renegade. Every time I get in it I'm surprised she doesn't get in more accidents. Never mind the A/B pillars, the C pillar is like a solid foot and a half wide: https://st.motortrend.com/uploads/sites/10/2016/05/2016-jeep...
If you try and back out of somewhere at an angle you're backing out 100% blind.
There is a lot of concern over a lot of these auto-assist features reducing the engagement of a driver. It is a trade-off of course. An automated system with good sensors can react faster than a human driver to prevent some types of wrecks, but they do have limits. Over reliance can lead to the situation where that Tesla drove full speed into an exit ramp barrier.
Until ever street has guide rails and ever vehicle can attach to a track, truly safe autonomous vehicles are a very difficult problem and a long way off. A standard street track system would probably be cheaper honestly (and it's a solved problem).