So if you are too lazy to plug it in every night or your day to day driving exceeds the battery range you shouldn't buy one.
One of my neighbours has one but nowhere to plug it in. I have no idea why they bought it.
This wouldn't stop me from buying one.
There are reasons to buy a PHEV even if you never plug it in. Their electric motors tend to output more power than gasoline/HEV versions of the same model, leading to more performance and a quieter drivetrain (even with the engine running, it doesn't have to work as hard). You can also run climate control and infotainment while parked without having to idle the engine, which is nice when waiting around on a hot day. Or you can remotely start the air conditioner with your phone.
Basically you can get EV quality-of-life features on a gasoline-powered vehicle.
I probably wouldn't recommend a PHEV to someone who doesn't have a place to plug it in every day. But there are reasons to buy a PHEV beyond just fuel efficiency.
Not everyone is rich enough to live in a private house, where one could plug EVs daily.