You're entitled to your own beliefs too, but it is also arrogant to believe that stuff won't happen after so long in the hobby. Anything can go wrong unpredictably. You cannot tell when your water company is going to flush your pipes and change your parameters. You cannot tell if a tank is going to burst open and now you are forced to carefully acclimate fish into new water in an emergency.
Chances of these happening are slim, but if you'd like to rely on a petstore worker to tell you "your water is fine" then have at it. Having a *reliable* store is a luxury, not a privilege to everyone. Most places deal with stores that tell them their uncycled water is fine to add fish to because there's 0s across the board. I'd steer very clear of that.
This does not make my experience and many other people's experiences "wrong". In fact it's rude of you to flat out dismiss it as wrong.
Chances of these happening are slim, but if you'd like to rely on a petstore worker to tell you "your water is fine" then have at it. Having a *reliable* store is a luxury, not a privilege to everyone. Most places deal with stores that tell them their uncycled water is fine to add fish to because there's 0s across the board. I'd steer very clear of that.
This does not make my experience and many other people's experiences "wrong". In fact it's rude of you to flat out dismiss it as wrong.