This used to be true, but unfortunately, like USB-C the game has changed completely.
The downside to standardization is that if you keep the same physical form for multiple iterations, the internals can change. The specs of the source and receiving ends have gone through tons of changes since 2015 and old HDMI 1.4 Cables don't have the same standards to transmit high speed signals from things like PS5, Xbox, Apple TV etc.
Additionally because they require programming and HDCP (a verification handshake between the 2 devices it connects) when companies cheap out they may not properly program them.
That being said, you don't need spend an arm and a leg, but don't get shit either. Generally speaking, buy the cheapest version HDMI 2.1 from a reputable brand or vendor. Definitely not from Amazon anymore, a TON of products labeled 2.1 are actually 2.0 or worse, 1.4.