Real reasons I can see to use a VPN service
1) You want your traffic to reliably egress in that country. i.e. I live in New Zealand but to access some Australian TV on demand, I need to "appear" in Australia. 2) Errr, I can't think of any others.
If you are really trying to hide your traffic from your ISP:
1) Change ISP 2) If that's not possible, buy a cheap VPS and run OpenVPN/Wireguard on it and egress your traffic via it. Disable all logging etc.
i.e. Unless you need traffic to egress via a particular place and you don't care about someone you don't know seeing your traffic, buy a VPN service. If you DO care about your privacy really, buy a VPS service in the country you want it to egress.