I feel the company's modus operandi is to have easy and cute UX to simplify using security tools.

Their VPN software is apparently very easy to use (from reddit comments). The same will probably apply to the password manager. They also seem to have a good marketing and PR team since I see them around quite a bit in youtube videos (Linus' being the most prominent one) and ads thinly veiled as articles. These two points alone have the ability to make the difficult mainstream user market to use it.

If all your security tools had similar UX and only a single login (what we see as single point of failure is usually seen as convenience), then you'll get many people to use it.