Which means you have no idea how those PSUs are to be connected, cannot cut and strip wires, etc. And you're stuck with what ever your local LED shop sells at a mark up.
Sadly most of the cheap PSUs from China are quite worthless longevity wise. Some units last, many don't. That's why I keep using my old laptop PSU from Delta but when you want to buy such PSU you again get tons of results of cheap Chinese crappy replacements and only at a comparably high price will you find the original PSUs.
Those metal caged PSUs may be of better quality than the plastic cased ones, they tend to cost more too. But you should mount them somewhere safely at best put them in a ventilated box out of reach.