You're talking to ME about motor vehicle regs? The hidden wipers and the hood height contribute to meeting pedestrian safety regs.
EUR-Lex - 31974L0483 - EN (europa.eu) sets out the European requirements and requires that nothing sharp protrudes.
There are several ways of achieving those requirements.
Mercedes does it by incorporating a lift at the rear of the hood that deploys following an accident and effectively moves the flying pedestrian away from hard engine surfaces and also resolves the wiper issue.
Automotive safety is constantly evolving, but rather than tacking on ugly bumpers (70's), those safety improvements are now subtle - like hidden wipers.
Do you really think that VW would design a confoluted system for wipers "just because"? If it were merely aerodynamics, then they could add little wings to the wipers.
Grilles are getting more upright, there is more room between the front and the hard bits and hoods are getting higher - to provide more clearance between the hood and those hard bits. Some manufacturers, like VW, have also used that to meet the pederstrian safety requirements for wipers.