I generally agree with your statement. While i consider Proton offer better privacy than regular tech company, their free plan feels too generous considering no data limit and "medium" speed. Meanwhile other company put more strict limit on their free VPN, such as 10GB/month data limit on windscribe.
That's a good thing, right?
Proton doesn't sell your data.
In fact, they can't even read almost all of your data since it's end-to-end encrypted.
They are moving out of Switzerland right now specifically because of their new anti-privacy laws.