You can't even trust what's printed on the ICs. Seriously, look into chip counterfeiting, it's a real problem.
That's why active components from Digikey and Mouser are so much more expensive than what you see on Amazon or eBay. They can trace the components back to the fab where they were made. You pay more, but you know you're getting what you ordered.
Do I trust it to work safely in my use case? Yes.
Other than people that buy from actual specialty stores, that's basically how buying anything works these days. You use your best judgement and continue on.
When you use counterfeit power components like SCRs, the risk you take is burning down your house with your family still inside.
Hey, it's your call. You're free to use what you like. Just don't say we didn't warn you.
Is it unlikely? Maybe, but also it has happened enough times that it's probably worth paying attention here. Relevant on today's front page https://news.ycombinator.com/item?id=44638580