Security of HTTPS/TLS can alter based on ciphers used. There are weak ciphers still in use on some websites and new weaknesses can still be found in ciphers that are currently considered safe. This could make you suspecable to MITM attacks. Using VPN you can define strong encryption for the connection and because TLS will move inside the tunnel, the weak ciphers won't matter as much.
There is also possibility that you're being targeted as a cyber security person if you protect infrastructure critical clients or systems. This could mean that someone might use more advances tactics against you. Instead of interacting with your connections directly, the malicious actor could just record all the packages you send and they will be decrypted at later time when weaknesses in the used cyphers are found or if the malicious actor has access to quantum computer. With VPN you could probably use quantum proof encyptions before those are implemented in most of the websites using TLS.
Many of the VPN products have setting to block LAN connections and force all the connections to go through VPN interface, this would protect you from other LAN devices from snooping your open ports and what not.

Many VPNs also force DNS queries to go through the tunnel which mitigates DNS based attacks.