Are you even a full node if you're not validating every script? And what about every sidechain that peg-in using a BTC script? Gotta verify what you can on LN also, and you must run BitVM alongside Ark to verify bitcoin to the fullest extent, right? Gotta verify that arbitrary data on your node can actually be interpreted as JPEG. Otherwise you're just trusting that there's jpegs in the blockchain.

Truth: there is no proof of full node. Validate what you care about. The "fullness" you can achieve depends on the size your hard drive and how hard your "drive" is to care about onchain data.