Exactly!
When CFLs came out about 20 years ago, they were expensive, $8US or more.
Then I found some units on the dollar store which were exactly $1US apiece. I immediately bought units for the whole house, over 20 units.
The light was a little weak, but hey, what can you expect from $1US.
One evening I was working on my computer, when there was a loud bang and smoke started pouring from one of the lamps.
I immediately turned off the light, and after a while I removed the lamp.
Of course, an autopsy was made. Turns out there had been a short between the pair of AC lines, and the PWBA, a cheap paper phenolic type, started to burn. Later I tested the plastic enclosure and it also burned readily. No flame retardant of any type.
If it had been my wife in the room, or would the room had been unattended, something really bad could have happened.
Afterwards, I removed and discarded all the other lamps.
NOT SAYING that this particular PSU of yours will burn. Only saying that to achieve a certain price range, shortcuts are made.