The guy who invented it tested it at various speeds and angles: https://en.wikipedia.org/wiki/Wire_strike_protection_system https://en.wikipedia.org/wiki/Wire_s

The guy who invented it tested it at various speeds and angles: https://en.wikipedia.org/wiki/Wire_strike_protection_system https://en.wikipedia.org/wiki/Wire_strike_protection_system. There are also numerous documented cases of these working as intended in the NTSB database. The FAA did a study and found that wire strike cutters significantly reduced fatalities https://skybrary.aero/sites/default/files/bookshelf/3288.pdf https://skybrary.aero/sites/default/files/bookshelf/3288.pdf So no, not a dumb idea according to the FAA's data backed study, the US military, and the people that operate helicopters.