Well, I'll try to sum it up.
The author of VM certainly wasn't inspired by DNA as it was discovered only in the 20th century. I hope we all agree here
But of course he could create by accident something working in a similar way.
The problem is that even today we very poorly understand how DNA works. How some sequence of proteins makes for example one person brilliant and another person dumb. We can spot correlations - some sequence of DNA correlates with some genetic disease so it must mean that disease. But if I gave you some random DNA sentence, there isn't any modern scientist in the world who would say you what it means. So I would say DNA isn't a good model of anything because it actually doesn't help to make any predictions.
Actually I also believe that science claims that 90% or so of DNA in living organisms is useless crap
It is an inactive code that never gets executed and doesn't make any sense. If it was to be executed then the organism probably wouldn't survive embryo stage. In that way it may turn out to be a good analogy of VM which may actually to be nonsense too 
But if I get the used metodology right, in practice it just means that Voynichese is reduced to 4 symbols, like 4 proteins building up DNA. Let me quote:
Mapping: 'qokedy' → AGGATA; 'olchedy' → TCGATA; 'qokeedy' → AGGAATA.
Does it really help with anything? We just lose a lot of information. And what actually AGGATA means? Is it a word? Or some instruction for a machine?
The author of VM certainly wasn't inspired by DNA as it was discovered only in the 20th century. I hope we all agree here
But of course he could create by accident something working in a similar way.
The problem is that even today we very poorly understand how DNA works. How some sequence of proteins makes for example one person brilliant and another person dumb. We can spot correlations - some sequence of DNA correlates with some genetic disease so it must mean that disease. But if I gave you some random DNA sentence, there isn't any modern scientist in the world who would say you what it means. So I would say DNA isn't a good model of anything because it actually doesn't help to make any predictions.
Actually I also believe that science claims that 90% or so of DNA in living organisms is useless crap
It is an inactive code that never gets executed and doesn't make any sense. If it was to be executed then the organism probably wouldn't survive embryo stage. In that way it may turn out to be a good analogy of VM which may actually to be nonsense too But if I get the used metodology right, in practice it just means that Voynichese is reduced to 4 symbols, like 4 proteins building up DNA. Let me quote:
Mapping: 'qokedy' → AGGATA; 'olchedy' → TCGATA; 'qokeedy' → AGGAATA.
Does it really help with anything? We just lose a lot of information. And what actually AGGATA means? Is it a word? Or some instruction for a machine?
