I realize the
new car market may be an abstract concept to you but, believe it or not, auto makers constantly shittify assemblies to encheapenate them to remain cost-competitive. The euphemism commonly used for this inferiorizing process is "value engineering". The folks that bought the vehicle new and didn't have to think about that hose clamp for the entire time they owned it got their value out of it.
Between lower part cost, faster assembly time, fewer assembly line tools requiring calibration, and lower instance of post-sale leaks (which would add warranty cost), that constant-tension clamp & similar "innovations" made that car ~$500 cheaper to produce than the same product using 20 year older technologies. I hope you, being a bona-fide cheapass, can appreciate that paying $500 less for a car would leave you budgetary room to replace
all the hose clamps with shiny new stainless ones from VatoZone if you really wanted to