Even without "spam" how large do you think the blockchain will be in 10 or 20 years? Potentially billions of people will be using bitcoin at that point, it will be huge compared to what we have now. What happens then? Roughly 2-4% of the blockchain has some kind of media/images on it today. Are people going to run nodes if the blockchain is 25TB (without images) or will they say it's too big? You have zero evidence of Core corruption, that's just fake news being spread by people trying to fool you.
Discussion
Even if 2-4% would be spam (which I think it will be much higher), simply switching to knots (or reverting the filters to how they have been working fine for the last decade) will help have less spam on the chain, even if it is 2-4%. And who would "fool me" into this, and what incentive would they have?
Why would it be higher? Why isn't it higher now while the fees are so low? Remember, once a billion or more people are using bitcoin the fees will increase significanly and putting images on will become extremely expensive.
Fooling/decieving others into believing Core is compromised (with no evidence whatsoever & mostly to new bitcoiners) in order to get them to use Knots instead. Knots is ok to use but the accusations and lies are a disgrace.
Btw Knots doesn't stop (or even reduce) spam for being recorded onto the blockchain. You know that, right?