Why so critical of "universal" flex radiator hoses?

If you want your engine bay to look purty - cars shows, even snoopers who must comment on any classic car that pops the hood on the road, do like hot rodders and fab a custom hose. They like the upper hose for a Ford F-150 since long w/ many bends and cheap. If you cut in two you can rotate to fit almost anything. Use a purty aluminum splice (ebay red, blue, grn) which can come w/ fittings for a temp sensor, integral screen or such. Of course, if you can find a single hose that works, that is slicker. Many are for several apps and you cut off what you don't need to fit. If you search, you can find PN's others found that work. Lowers are easiest, uppers vary more depending on components like AC.