There's a fair amount of FUD tossed around in sponsored ad reads of a lot of independent creator content these days, so much now that the colloquial use of "VPN" these days for the masses is not "allow me to gain access to a network I control from anywhere" but "help me route my traffic to a specific geolocation".

Half truths are spouted about "securing your connection" and "preventing tracking" are provided, without the supplementary information that device and browser fingerprinting do more to identify you as a user than geolocation does. With HTTPS, traffic is already encrypted, and any DNS-over-HTTPS or TLS provider will also mask where you were headed to, leaving much of the supposed benefits to be mostly snake oil.

If, however, you want to use it to access geofenced content, or you employ an obscurity-in-depth strategy to anonymize your identity, then sure, go ham. But as to why usage has exploded by the masses, a healthy dose of paranoia and influencer marketing.