I always wondered what prevents the "red team" from ordering the same tape from amazon and reapplying it in the end. I suppose you can sign it, but that has dubious security. Am I missing something?
That's the exact reason why techniques based on hard to duplicate random patterns exist. Anyone can buy off the shelf tamper resistance seals, they mostly work against unsophisticated attacker. Better ones have a serial number, which mitigates this problem. Although you still have to trust the manufacturer (or different factory) will not produce a custom order with whatever serial numbers you want (especially in case of state level threats), or simply reusing serial numbers due to poor practices and simply not caring about effectivity of their security product, which as shown by physical lock manufacturers isn't rare. On more problem with off the shelf tamper seals is that attacker can buy analyze and practice bypassing/reapplying them. I guess you could also have the random pattern embedded within tamper seals thus giving better duplicate protection compared to serial number, not sure how much tamper seals have this feature.
Not to defend the tapes, but typical use case of holo tape is to make your own pattern, which comes with big setup cost and small marginal cost of production, so it's not economically feasible/reasonable to copy it for one-off stunt.
I'm sure we've come a long way since the Xbox 360, but I trivially defeated the tamper tape in mine with my moms hairdryer.
Tapes/stickers are relatively easy to bypass without being evident.