I think people are latching on to the magnitude of your claim rather than the direction and therein missing the point. FWIW, as somebody who meets your criteria, myself and my network of people from that time offer much credence to your claim.

Even back in 2016/17, many people involved were openly bemoaning how 80+% of ICOs were unregistered security offerings to vaporware.

You can almost pinpoint the inflection point at which Coinbase decided their goal was short-term profit maximization vs developing a healthy ecosystem. The company in the last 5 years is completely unrecognizable in contrast to when there were only 3 coins you could buy from them (USDT, BTC, ETH).