People have been saying this for a number of years, now, and Amazon only grows faster. Tools like this may have actually contributed to that growth, since they make shopping on Amazon safer, ironically.

Amazon has the same advantage that Microsoft had in the 90s: everybody else is even less competent.

I don’t agree. The advantage both had/have is a level of scale and brand inertia which makes it financially near-impossible for alternatives to grow large enough to compete.