The Scalability Trilemma: Security vs Decentralization?

Hey all,

I have been studying the Scalability Trilemma lately and have a question on it. Of the three points (Scalability, Security, Decentralization), scalability is the only one that is adversely affected by more nodes, due to the fact that a copy of the chain must be distributed amongst all validators.

So, theoretically, the more nodes you add, the more security and decentralization you add.

So, how is it then possible that you can, say, have a network that is decentralized and scalable, yet not secure?

If the nodes exist to make it highly decentralized, does that not mean that it is inherently secure?

If anyone could help clear this up, that would be immensely helpful.

Thanks

https://preview.redd.it/uudabej3csx91.png?895&format=png&auto=webp&s=aa8dd7d56750097d64ad7d8d675a7a01ff35ee69