It’s just using a different middleman. One middleman might be better than another, but if you have a good ISP already, there’s no privacy/security benefits to be had by using a VPN when surfing from home.
It might be worth getting a VPN if you use sketchy WiFi often, or want to bypass geo-blocking or restrictive firewalls. But remember that you’re trusting the VPN provider with all your traffic. DNS is still not encrypted in most browsers, so this traffic is still a goldmine of marketable info. Sure, they can’t see what you post on snapstagram.com or what pages you visit on news.ycombinator.com, but they can infer a lot about your browsing habits from DNS queries.