Anti adobe is cool - the recommendation is appreciated… but any software can be the target of a document based exploit and may well be susceptible to the same exploit depending on the libraries used. Additionally, smaller software projects can take longer to update as they have less staff working on them. Absolutely support open software and alternatives… Just a word of caution.
If you view it on your system it’s a vector. Large / complex documents which may parse things with different libraries just happen to have a larger attack surface.